One of our group hardly said anything for literally years, just turned up and rode. Never bothered any of us! He chats plenty now he’s got used to our motley crew… He’s got rather fast downhill as well.
I’m not slow downhill but I’ll often go at the back of any new group I’m in – you can never tell who’s going to be fast and I hate feeling like I’m holding anyone up, so if you’re worried about your speed just hang back.
If you contact a local group and say you’re going to come along will you be more likely to commit? Remember you’re there to ride your bike, you don’t need to chat, don’t feel you have to! The group got on fine conversationally before you were there, don’t pressure yourself to be social.