Join a tabletop gaming club or group. I mean the obvious choice would be to join a club in general, but sounds like your challenge is finding the reason to go out or what activity to do. My suggestion is, through games you can meet and interact with a lot of people and some of these groups are operating in clubs, so have a look and see what’s around your area. It could be anything from DnD to regular card games or any other board game you can think of.