Could you please check my letter?

Dear Andrew,
I was so happy to receive your letter! I am looking forward to meeting you again! I think we could have a good time together!
You asked me about my schedule. So I usually do my homework for two hours and it doesn't seem to me very long. However, there are some oral tasks which take a lot of time. For instance, History - I have to learn all the dates and events and it's really hard work. Though, sometimes I just read the material but not learn it since I cannot afford to sit at the desk all the time - besides I have other classes.
Yes, I think you should always plan your day in advance and you won't have to go to sleep after midnight. You can do everything in the afternoon.
Unfortunately, I am very busy now, Take care and keep in touch!
All the best,
Mary