Проверьте пожалуйста, правильно ли я написала письмо на английском языке?

Если нет, то исправьте ошибки.
Thanks for your email. I'm fine. On Saturday afternoon I'm going to do my homework. Then I'm going to meet with my friend and we are going to walk. I'm going to come home late. On Sunday morning my parents and I are going to a store or a market. After shopping I'm going to need some rest. I'm going to do prepare copybooks and textbooks for Monday. Well that's all.Wrote soon.