Dear brother:
How are you?I am fine.Do you miss me.I like my new school.I made a lot of friends.They are really nice to me.Now I am taking Math,English,Chinese,Art,PE,history,and so on.My favorite subject is PE.We are currently learning how to play baseball.Baseball is hard but it is fun.Math is hard for me.I am going to see you on Sunday.
Take care.
Best wish.
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我不知道你的信要是什么内容的,如果你愿意的话,具体写一下,我可以帮你翻译.