I wouldn't race until your at least in the I group. You have track days available to you to learn and hone your craft. When adrenalin kicks in, you'll forget about riding with skill and just try to go fast. You need some experience under your belt. Work on passing, be comfortable being passed, REALLY close.
Getting lapped by a fast expert rider will really wake you up. If your not holding your line and consistent, your a danger to other riders and yourself. This is serious business and shouldn't be rushed. Back in the day, you just bought your license and went to it! Those days are over. Practice, practice practice. Racing will be safer, more fun and more rewarding.
I did my first time ever on a track at a race school. Decided to do a couple track days and race. When I found that I'd be competing against the CR's that were working with me. I decided to do a bunch more track days.
You'll get lots of opinions on this. Just be smart. Racing is a whole different animal at another level.