"If you want you can"; leadership role

Hello, this scholarship is very selective, I have a good profile to be chosen,
I need a correction for my introduction please :S
I feel that it's not good enough, something is missing, my be how I began the first sentence !
I'd be so happy and much obliged for any help or comment
THANK YOU

One of my favourable quotes is "If you want you can", since I was young I believed that every thing is achievable. Actually, after an enormous hard work, planning and determination I got an excellent average in the Baccalaureate exam, I even got an award from the minister. I believe that succeeding in your esteemed university would be undoubtedly the next achievement in my schooling career. For me, the more competitive the background is, the more I feel my self more motivated to be the best.

This sentence feels a little awkward to me and there's too many more s. You might want to use a synonym.
There may still be some errors but it's pretty good.
Oh and one more thing; here is a comic on the proper use of semicolons.