这是美国签证的个人陈述书.帮我纠正一下语法.尽量加上为什么

这是美国签证的个人陈述书.帮我纠正一下语法.尽量加上为什么
Personal statement
My name is xxxxx and English name is xxx. I am from Beijing xxx school. I am fifteen years old. I have a lot of hobby in my life. For example to play badminton and swim sometimes I play badminton with my parents. And go to park or shopping with my classmate.
There are five people in my family my mother father and my grandparents. My parents have only one son that is mine.
I think I am a sun boy and I like to travel and outing.
I want to join this activity because I know the U.S. is developed country it have developed economic and developed education. I think important is education of the U.S. that is very good. And there are also have many beautiful somewhere.
I think I will learn a lot of things about education language and Social knowledge in the U.S.
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