Let's Get Down To Business!
When I woke up I found myself in a room, the room looked so clean, there isn't a single dust can be found, and the item in the wall is perfectly arranged.
Alright, This is a wretch. The first segment looks clean enough, but then you run on with commas. So First I'm going to do Grammar Corrections then I'll go FULL AMATEUR EDITOR and try to spruce it up a bit.
When I woke up I found myself in a room. The room looked so clean: There wasn't a single speck of dust to be found, and the items in the wall were perfectly arranged.
So I changed up the punctuation, and some of the wording; I don't know if dust is a countable noun, and it doesn't make much sense for you to arrange just ONE item. I also kicked everything into past tense (Tip: Keep tense throughout. You can change between simple and perfect in a paragraph (I do this and I have done that), but don't do between do and did, unless you're writing dialogue.)
I'm going to try to spruce this up a bit.
I woke up to a bright white room, clear of any trace of dust. I hadn't focused my eyes enough to make out what everything in here was, but the arrangement felt truly melodious.
Hit with the action immediately. While passive voice is grammatically correct, active voice puts your reader right in the action, for all those lovely feels to kick in.
But I ignored all of it and a head toward the bathroom to clean my face but what I see surprised me.
But can mbe used in descriptive grammar to begin a sentence, but not prescriptive. (English is Germanic not Latin, shove it English Teacher!) The way you have it now, you'd want to combine it with the previous sentence. Again you futz your tense, and this time in a way that isn't even technically correct.
I ignored all of it and headed toward the bathroom to clean my face, but what I saw surprised me.
There. Now it at least makes sense. But we can go
even further beyond.
But that could wait: My body felt wrong, and I had to know why. I spotted a bathroom on the far side of the adjacent wall and made a beeline for it. I stared down the mirror-
I read ahead a little bit, and felt the cutoff was appropriate. I also injected a reason for your character to go to the restroom ASAP at the expense of everything else. And no, not going to the restroom either; that wouldn't follow. They'd just take the shit instead.
"WHAT THE HELL, WHY DOES MY BODY BECAME LITTLE!!!"
This Does Became? No, does/did verb takes the infinitive.
"WHAT THE HELL, WHY DID MY BODY BECOME LITTLE!!!"
This is actually pretty cool on it's own, and so I made it blue :) Cause blue is cool, and I have blue keycaps on my board.
"WHAT THE HELL, WHY IS MY BODY LITTLE!!!"
This is what I would use though. Feels a bit more natural for speech. That said you know your character better than I do.
how did this happened, and where am I this is not my house, how can I be so relaxed right now?
Oh Fuck What Is This. Okay, no caps, did happened, and switching tenses OMG. Please no.
How did this happen, and where was I? This was not my house; how could I be so relaxed right now?
This fixes you from a grammar perspective. But I think we can jazz this up a notch.
Okay. I took a breath, for it was time to think: How did this happen? And where am I, cause this isn't my house. And why am I so relaxed about this?
Italics to mark train of thought. Some people don't like inner monologues; I do. If you don't, you can probably mix up something else neat. Thought streams are like dialogue and have spoken tense rules and not written tense rules. You can also throw in slang if you wanted. TECHNICALLY the where am I cause this isn't my house is wrong cause it needs a question mark, but I'm using the period to imply the tone in the monologue shifts down like an accusation instead of up like a question.
I put my hand to my chin and thought for a second.
This is grammatically sound, congratulations! I'm actually going to chain it to the next sentence though for the spruce-up.
How did this happened and how the hell did I not react to my surroundings earlier when I wake up?
Okay, did happened again. Also "when I wake up" describes a future event, not a past one.
How did this happen and how the hell did I not react to my surroundings earlier when I woke up?
Pretty simple affair. Now for the ONE TWO COMBO PATCH!!
I put my hand to my chin and thought for a second: how did this happen and how the hell didn't I react earlier when I woke up?
Italics optional on the right side of the colon. I use italics for when you think to yourself in words and you're talking to yourself, in your head. If the grammar permits it otherwise and I don't need/want to express monologue, I won't.
At that time, I heard the door open, what comes to my view is a blond girl wearing a brown dress and his pair of brown eyes is looking right at me.
Okay, does this girl use he/him pronouns? And if so,
is your primary audience the U.S. Trans Community? If she doesn't, the "his" is wrong, and if your audience isn't, you're gonna have fun explaining that to them. I'm going to assume that you did not intend a he/him girl; if you did, you can revert it.
At that time, I heard the door open; what came to my view was a blond girl wearing a brown dress, with her pair of brown eyes looking right at me.
There were a few ways you could fix this. Like, you could use period instead of semicolon, and the second comma could have been a sentence split, but I wanted to stay as close to your original format as I could. Now let's change a few things up:
The door opening pierced my thinking, and I faced the bathroom door to find a blonde girl in a brown dress, her matching eyes gazing into me.
Punching back to active voice, and taking advantage of your first-person perspective. blond/blonde is interchangeable but I like the sight of the e. I used a stronger form of looking to convey that she has your character's full attention. Also gave some action to give some more hint as to where in the room/setting this is taking place in. Now I'm not sure if "the door opening" is wrong in itself, but it sounds right. If you're worried use "the door's opening" or "the opening of the door" or some such.
"Brother what is it, did something happened?"
Only one error here :) (The Brother what is it with no comma suggests rushed speaking, if you don't want it use the comma)
"Brother what is it, did something happen?"
And this is good on its own. I wouldn't change anything. Good Job.
I'll handle these sets of lines as sets :)
Brother did she just called me 'BROTHER'
"No, Nothing happened, everything is alright Sofia,"
My mouth is moving by itself, why do I know this girls name even though this is the first time I meet her?
Did called, and some caps, though not much technically wrong
.
"Brother"? did she just call me "Brother"?
"No, nothing happened; everything is alright Sofia."
My mouth is moving by itself. Why do I know this girl's name even though this is the first time I meet her?
The below line here is actually technically correct with the changes in orange, but doesn't really flow well. Now let's roll it in:
Brother? did she just call me Brother? "No, nothing happened. Everything is alright Sofia." My mouth acted by itself. I literally just met this girl, why do I know her name?
I'm using the boldface for the emphasis; if you want to use italics instead go for it. I also ditched the quotes because while it may not be prescriptively correct I don't think anyone will flame you for it. Also grouped it into one line because it's one person's thoughts and dialogue. Oh and monologue. It also declutters the quote marks.
The girl then signed and looked at me.
"Is that so, I suddenly heard you scream I thought something happened, so I ran over to checked, well you seem to be just fine, brother, I just finished making breakfast eat it before it goes cold. she finished talking, she leaves
Ran over to checked is wrong, and a run on here. Also not closing your quote. I'm also assuming she's sighing and not using sign language.
The girl then sighed and looked at me.
"Is that so? I suddenly heard you scream. I thought something happened, so I ran over to check. Well you seem to be just fine, Brother; I just finished making breakfast: eat it before it goes cold." she finished talking. She left.
Again, technically serviceable, but we can do a bit better, don't ya think?
The girl sighed. "Is that so? I suddenly heard you scream; I thought something happened, so I ran over to check. Well, you seem to be fine, Brother. I just finished making breakfast: eat it before it goes cold." With not a moment to spare, she turned and left.
I got rid of "looked at me" since she never actually stopped looking. I also shifted some of the punctuation a bit, and I got rid of "finished talking" because that's already communicated by turning and leaving.
Alright, all of these segments should be a bit more lively, let's put them together:
I woke up to a bright white room, clear of any trace of dust. I hadn't focused my eyes enough to make out what everything in here was, but the arrangement felt truly melodious.
But that could wait: My body felt wrong, and I had to know why. I spotted a bathroom on the far side of the adjacent wall and made a beeline for it. I stared down the mirror-
"WHAT THE HELL, WHY IS MY BODY LITTLE!!!"
Okay. I took a breath, for it was time to think: How did this happen? And where am I, cause this isn't my house. And why am I so relaxed about this?
I put my hand to my chin and thought for a second: how did this happen and how the hell didn't I react earlier when I woke up?
The door opening pierced my thinking, and I faced the bathroom door to find a blonde girl in a brown dress, her matching eyes gazing into me.
"Brother what is it, did something happen?"
Brother? did she just call me Brother? "No, nothing happened. Everything is alright Sofia." My mouth acted by itself. I literally just met this girl, why do I know her name?
The girl sighed. "Is that so? I suddenly heard you scream; I thought something happened, so I ran over to check. Well, you seem to be fine, Brother. I just finished making breakfast: eat it before it goes cold." With not a moment to spare, she turned and left.
This feels kinda nice, and like something I might read :) I actually like your premise, and I hope showing how I went about things helped a little bit. You may use this segment as written for your story if you wish, or you can change it around. Up to you.
Sorry for the lateness of the response, and best of luck on your quest.