With the mods you have listed in your signature, I think you would be placed in ESP according to SCCA Solo II rules. If you added on a super charger, then you will be in one of the Mod Prepared classes. I am going to guess your friend ran in the STS2 class, which is the well known "Spec Honda" class because that is the car to have in that class. Check out
www.scca.com or even
www.autocross.com and take a look at the class rules and the national results to see what classes different cars run in. It will help you see where certain cars run and what they have done to them to be in those specific classes.
The best 2 classes to run these cars in is either F-Stock or ESP. I run in F-Stock, stock class is a lot lighter on Mods hence budget can be a lot lower to run also. But it is best to have a competitive F-Stock car before going up to ESP because some of the mods will be the same. Each classes builds off the class below it. You are already past that point but for a beginner run in whatever class they put you in, the only way to get better is with seat time. Work on your driving first then worry about the car. By the way the F-Stock national champion, Sam Strano, posts on these forums.