Hello,I'm XXX.You can call me Crystal.I'm from XXXX middle school.I'm interested in English and this is the reason why I come here today.Practise English and enjoy the competition.And I want to study abroad in the future because they have very good education.I'm trying to do my best.And I belive where there is a will,there is a way.

they have ？

人生就像愤怒的小鸟，当你失败时，总有几头猪在笑。

And太多， 而且全是I开头。口语的话加点well，you know，之类听着舒服。内容上自我介绍说爱好可以用ameatur， I'm an a of xx(活动或者运动名词或动名词）

they have better education conditions。

。。。。。。

还有什么提议吗？

先不说其它的，你开始全是I'm什么什么的，听众会感到很无聊，尽量用不同的主语开头，加上一些连词什么的

应该大气一些，比如说: What an honor it is for all of you to have me here !

要突出自己的特色

差不多

中式英语。。。

我新写的:Goodmorning,ladies and gentlemen,it's my great honor to be here and see you all.I'm XXX.You can call me Crystal.I'm from XXX middle school.I'm an amateur of piano.And I enjoy studying,especially English.So this is the reason why I come here today--for practise English and enjoy the competition.You know,studying abroad is my dream and I will try my best.I always believe where there is a will,there is a way.

这会不会好一些？