I'm Makeup Challeneged!?

Honestly, I'm not a make up person. But I have a competition(I'm in Color Guard) coming up and I need some major make up tips! I have skin that's close to Gabrielle Union's or maybe Angela Bet. So I was wondering did anyone know any good but low costing liquid foundation and loose powder stuff? Lately I have used Rimmel London's bronzer but I need something new. Help!