Google search for clubs in your area or ask a local shop. Many shop sponsor rides and have a designated mentor for new riders. After all, they want to keep you coming back! My local shop does a weekday evening ride with all levels--from A+ hammerheads to D, new to the sport, I promise to not leave you alone.

You didn't say, or I didn't catch how old you are. The key, I think, is to not over estimate your ability. Riding in a group is an attained skill, and experienced riders might not appreciate someone still learning. But, you'll get there, probably pretty soon.

FWIW, my brothers and I starting with a local group when we were 17,15 and 13 years old. A few "older guys" took care of us and showed us the ropes. That was in 1973. We just went to our leader's 90th birthday party!