Do yourself a big favor and get some professional instruction first. Something like a two day course at skipbarber.com It might sound pricey but it really is worth it.

Drag racers turned road racers never know how to take care of their equipment. They bang the shit outta the gears, they redline every shift, they lay on the brakes forever and they have no idea how important warm up and cool down laps are. It isn't impossible to make the transition, just keep those points in mind when you start tracking and you'll do fine.

Oh, and leave the ego at home.