Good ideas above. Another thought is to contact your local road bike shop and ask them about clubs and youth development groups. They are tuned into everything cycling going on in the community. Best of luck, welcome to the fraternity and most of all have fun!

and forgot to say I have ridden in groups with ages ranging from 16 to 46. You will have a lot to learn about riding safely and predictably in groups. If they get snarky or yell, find a new group.