每天我用中文和英语写日记！(｀･д･´)

if i use wrong expression, please tell me!
如果我有打错的地方，请告诉我！

我今天十点钟起了床，下午两点半开始上课（前后顺序转换一下比较好，起床—>上课）
我经常坐特快去大学，可是今天坐普通电车。
所以到大学要两个半小时。(平常要一个半小时)
我早一点儿就到了大学，练了钢琴一个多小时。（“早一点儿”不要放在最后）
星期二我常常在大学练钢琴。
我家也有钢琴，可是大学的钢琴比我的要好。 （“要”在这里的意思相当于“than”）
所以我有时间的时候，在大学练。

I have classes from 14:30 today, I woke up at 10 o'clock.
I usually get on a limited express to go to university,
but today it is a local train that I took.
So it took me two and a half hours.（两个半小时有两种说法，“two hours and a half ”和“two and a half hours”）
(always it takes me one hour and a half)
I arrived at university early, I practised the piano one hour more.（practice是形容词，practise是动词）
I often practice it in university on Tuesday.
I also have a piano in my house,
but pianos of university are better than mine. (pianos—>are)
That's why i practice it in university in my spare time.

感谢看我的日记(⊃д･｀)
I'm glad that you read my dialy!

每天我用中文和英语写日记！(｀･д･´)

我只会帮助你在英文方面 -- 不好意思。

I have classes from 14:30 today, I woke up at 10 o'clock.
I have classes starting at 14:30 today.  I woke up at 10 o'clock.
It's ok to use short sentences.

I usually get on a limited express to go to university, but today it is a local train that I took.
I usually get on a limited express train to go to the university, but today I took a local train.
"it is a local train..." is passive construction.  It is better to write directly / in the active voice.

So it took me two hours and half.(always it takes me one hours and half)
So today it took me two and a half hours.  It usually takes me an hour and a half.

I arrived at university early, I practiced the piano one hour more.
I arrived at the university early, and I practiced the piano for an hour.
Logically this seems strange, since it seems you should have arrived late...

I often practice it in university on Tuesday.
I usually practice piano at the university on Tuesday.

I also have a piano in my house, but pianos of university is better than mine.
I also have a piano in my house, but the pianos at the university are better than mine.

This is why i have time, practice it in university.
This is why I like to practice at the university.

感谢看我的日记(⊃д･｀)
I'm glad that you read my dialy!
I'm glad that you read my diary!

Great work!

谢谢你们*+。ヾ(´▽｀)ﾉ。+*
我每天坚持学中文！
今天也写日记。
如果你们有时间的话，看看那个日记:)