Проверьте пожалуйста ошибки в письме: D Получилось ли у меня соблюсти время?

Hello,my dear Valera
How are you? How was school? Many happy returns of the day!
That was the first school month of september! I have got new subjects : informatics,physics. And you? Also I have gotmany new friends. I am sorry, I have to stop now,because I went to school!
Hope to hear from you soon! Good luck!