I agree with Oz Rider. Find out if the club will offer clinics as part of the series - many do. At our local training crit, there is a women's/juniors beginner race once a month, and more experienced raceers will come out and coach for these races.

Most importantly, make sure that you are comfortable riding in a tight pack. If you don't have the handlings skills, there is a good possibility of a crash.

That said, crits are some of the most fun I've had on a bike! They used to terrify me, but after some practice training crits, I really love them!

Good luck.

SheFly