我正在写一篇英文的自我介绍信,申请大学的,希望有高人能帮忙改一下语法错误和给一些建议或补充

我正在写一篇英文的自我介绍信,申请大学的,希望有高人能帮忙改一下语法错误和给一些建议或补充
My name is ```.I am a 19 year-old girl who is happy to have a chance to apply such a admirable university.
In many people's eyes,I am a out-going and sort of weird person with lots of thoughts.Many things can interest me but I often learn a bit about them,which I believe will do me no good.Now,however,I really feel like to do something in Environmental Science.Because I convince that it is not only creation is needed,but also protection.Although so far I haven't have a thorough thought of how to do it but I know I must do it!Supported by my families,I have made up my mind to major in Environmental Science.These following word may be a little big,but I still want to say:"I am long to change myself,and change the world to a better one."