Ohayou! (I would say "ohayou gozaimasu" because other sentences are written in the formal form.)  

Watashi wa gakusei desu. , Ima uchi desu. daigaku (???) 
(I'm student. I'm at home now.) 

Ima benkyou shiteimasu. (I'm studying now.) 

*If my English sentences aren't what you wanted to say, please let me know with your English sentences. 

Good job! It would be better if you wrote English sentences. I hope this helps you.