How to write an appropriate introduction?Who can help me polish this script?Thanks?

How to write an appropriate introduction?Who can help me polish this script?Thanks?
I am going to attend an
independent enrollment interview of a university.An appropriate introduction is
needed.Following is the draft,which I hope you can help me to polish and correct
some grammar mistakes I made(because I am not a native English speaker of
course).Because this is an oral introduction,the diction should not be to
formal.
I'm Charlie,from Petard High School.My hobby is computer
programming.I bought many books about Ruby,C++,Delphi,OpenGL and Assembly
language,and I learned them myself when I was in junior high school.So,two years
ago,I coded an OpenGL-based multi-threaded graphics engine and subconsequently
built a website and earned a fortune.
Because of this experience where I had
to log on some foreign forums such as OpenGL.org to discuss some technical
topics in English,I realized the importance of English.As a result,I made it a
rule to listen to English podcasts every day;and keep an English diary every
night.Gradually,English has become part and parcel of my life.Ultimately,I
devoted myself to major in English.This is not a compromise,but I will learn
programming myself and try starting my own business while in university.My dream
is to own a business of myself,not just to be a self-employed freelancer.I motto
is where there is a will there is a way,so I believe I can make it with my will!