yo meu nome é gabriela serei sua tomadashi

*I am making corrections assuming a casual tone*

thank you for seeing my entry.
Thanks for reading my entry. (This would normally fit better at the end of your entry) 

oh i feel a little nervous because i haven't used english for the a long time...:O
ok, i'm trying to refresh my memory of it.

first, let's let me introduce myself.
my name is Rina and i live in Japan.
in order to go to university efficiently, now i live alone in Tokyo. (this is fine, but a little awkward/unnatural)
To make it easier to get to uni, I now live alone in Tokyo
my family house is at Chiba.
That is fine, but one of these two would sound better:
1) My family's house is in Chiba
2) My family live in Chiba
it takes at least 2.5 hours (the shortest) to go back home to Chiba from here. you may think that i can commute from the family house, but from this semester, because of the trend to cut down on useing using the electric power electricity, my university decided to make the opening hour of my school earlier. that is, the first class begins at 8:30! ...i needed to leave home at 5am. wow wow wow 

then i moved near the university. now it takes me only 10 minutes to get there ^^ yey

it's hard to do everything by myself.
it's ok to prepare a meal, but it's tired of doing the dishes. to wash clothes, but of folding these.,etc etc...
I don't mind cooking, but I'm tired of doing the dishes... and washing and folding clothes etc.etc.
untill before today i've had a lot of heavy hard/difficult/challenging/important tests, so all i do is study, study and study! (i hardly even sleep!, those days i went to the bed at 5:00a.m. and then went to uni at 8:30. can you believe that? i can't :p ahah)...
then my room is in chaos a chaotic state  (I would say, "My room is pure chaos!")~~~~:Q i have to clean it...
can someone can help me?(*_*)hhh

well this is that's it.
xoxo

First notebook entry: Introducing myself

thank you for seeing reading my entry.

since this is writing, you read it

oh i I feel a little nervous because i haven't used eEnglish for the a long time...:O
oOk, i'm trying to refresh my memory of it.

Remember to capitalize (a→A) the first letter of the first word in every sentence

I think you meant to write "I'm trying to remember how to write English correctly."

first, let's me introduce myself.
my name is Rina and i live in Japan.
in order to go to my university efficiently more quickly, now iI live alone in Tokyo.

my family hause is at lives in Chiba. it takes 2.5 hours(the shortest time) to go back home from hereTokyo.

In the English language, we don't write family house.  We just write that our family lives in X.  X = a city

you may think that i can commute from the family house home, but from starting this semestaer, because of the (trend of cutting down on useing on the use of the electric power), my university decided to make the opening hour of a begin school one hour earlier. that is, the first class begin began at 8:30! ...i needed had to leave home at 5:00.wow wow wow

(trend of cutting down on useing on the use of the electric power)← All these words combined act like a noun

then i moved near the university. it now just takes me 10 minutes to go^^ yey Yay!

#Hooray!

it's hard to do everything by myself.
it's ok easy to prepare a meal, but it's tired difficult of doing the dishes.
It's easy to wash clothes, but of folding these.,etc etc... difficult to fold them.

easy and difficult are opposites.  We use these adjectives to describe actions.  "It is easy to X but difficult to Y".  For example: It is easy to eat cake but difficult to eat vegetables!
untill today i have had a lot of heavy tests, so just i do is did was study, study and study(i saved even sleeping slept less., these Those days i went to the bed at 5:00a.m. and i went to the univ. at 8:30. can you believe it? i can't :p ahah)...
then Now my room is in chaos  messy~~~~:Q i have to clean
Can someone can help me?(*_*)hhh

well this is it.
xoxo

#I like your composition.  It was fun to read.  Bunshou wa tanoshiku yomimashita yo.  I also started living by myself in college and had to be very responsible.