DCs are all grown up and I'm getting out into the world again on my own and considering joining some community groups/activities/clubs. Trouble is I find it really difficult to talk with people who are already in established groups and I can't keep the conversation going with anyone who talks to me. I can see their eyes glaze over with boredom, and they quickly find an excuse to move on. All I can think of is asking them questions, which works for a while, but then gets silly, like I'm interviewing them. 
I'm not totally socially inadequate, just take a while to relax with people and sometimes feels rather inferior if they speak better than me or are very confident.
I so much want to get involved and make some friends. Any tricks or tips you can offer?