the best modeling program for a newb (even some pro's like it!), is Zanoza modeler (Zmod). Not only is tailored for car modeling, but it's....... FREE!!
and here is an awesome tutorial to get you started, done by Ryan T. He's an awesome modeler who made the GT350R and GT500 for Racer (beutifull cars). enjoy, and good luck! http://ryan-t.m4driving.sm/Tuts/Zmodtut.htm
oh and a good game to try out. it's also free, and a great place to learn the ins and outs of putting cars into games.