I think you should have an essay that really addresses who you are and what your dreams are. When someone gives a scholarship to you, they are investing in you and your dreams. Good luck bro!

Be true to yourself and don't pay someone else to write it.

Write it the way you write any good application essay. First, plan out why you are a good candidate and second, talk about how the scholarship will help you. You should have a guidance counselor and a parent review your essay and then edit it before you submit it.