RE: What are the common classes raced?
Don't wait. Most tracks have some sort of novice class so you will be racing against people of your own skill level. But that is not important. What is, is how much you will learn at the track. I was involved with RC (off and on) for quite a while before I started racing, and I can't even begin to count how much I learned when I first started racing. Besides, if you wait you'll be kicking yourself for not starting sooner once you get to the track. Jump in, the water's fine! [8D]
You don't need an expensive RC to race, especially at the novice level. All you need is a car/truck, fuel/batteries, a controller and you! Racing is 10 times as much fun as it looks...
Welcome to the forums, and the RC obsession!