帮我看一下这封英文信件写的是否恰当

题目

帮我看一下这封英文信件写的是否恰当
我想通过随机发一些电子邮件结识一些世界各地的朋友,可能这样有点可笑有点幼稚,但我觉得这样是我锻炼英文写作的一个途径,最重要的是可以结识一些国外的网友.
现在信写好了,各位大侠帮我看一下是否有错误,比如语法、单词、格式和礼貌用语上的错误.
Hi,I'm a 20-year-old girl from China.I want to make friends by E-mail.It's amusing to make friends around the world,to know about the custom and culture of the other countries.I don't know who you are,may be from U.S.,or Thailand,or Korean,or Greece.But I'm pure-hearted to make friends with you,to know about you,whoever you are.
Please reply.

答案

know about (about应删)
don't know who you are,may be from U.S.,or Thailand,or Korean,or Greece the custom (这句应删）