求一小段英语的自我介绍~

Hello, everyone!
My name is Winnie. I'm a 15 years old girl. I live in the beautiful city of Rizhao.
I'm an active, lovely, and clever girl. In the school my favorite subject is math. Perhaps someone thinks it's difficult to study well. But I like it. I believe that if you try your best, everything can be done well.
I also like sports very much. Such as, running, volleyball and so on.
I'm kind-hearted. If you need help, please come to me.
I hope we can be good friends!
OK. This is me .A sunny girl.

How do you do ?
I amSercet .
I am from China.
I am XX(几岁) years old .

I am student in xx (校名） middle school.
I am in Class xx(班级) Grade xx(年段）.
I usually play xx(东西自己加下去）．
I like xx(食物） very much．

My name is 。。。 I'm ten years old There're four people in my family They're my mother father ,grandmother and i.I like watching TV and swimming. 自己写的，够呛，打了15分钟，语法绝对正确，谢谢来个最佳