You've played enough PGR that your hand is permanently cramped, and you can barely wipe your own ass now.  Put down the video game controller, grab that dusy old motorcycle helmet in the garage nobody is using, borrow Mom's Camry and head out to a local amateur motorsports event.  Who, what, where, when and how?  Racer Boy is here to tell you.  Everything you need to know about grassroots racing (cost, set-up, sanctioning bodies, rules, time) is explained here:

http://www.speedsportlife.com/category/dubspeed-driven-articles/racer-boy/

Enjoy the info, and I'll see you at the track!