Airfoil

Hello!

 I'm an undergraduate mechanical engineering student and I an working on a team that is building a Mini Indy Race-car for the Formula SAE competition. I've been doing research on airfoil designs that we could potentially use for our car. The problem is, due to my lack of knowledge on airfoils, I'm not so sure how I should go about the design. I've looked at NACA airfoils and the different variations they have, but I don't know which series would be a good starting point.