Where are you? There may be a club near you and clubs usually welcome new riders. Our club even has an orientation ride.
You could try to ride with people you meet on the road, just talk to them and explain yourself. If they're jerks, keep looking. I would stay out of pacelines until you are confident in your abilities and the abilities of those around you. I won't get into a line with strangers on a charity ride, etc.
Eventually you can find people who enjoy the same types of rides you do and you might make some good friends, too. Riding alone is o.k. but riding with friends is so much better.