If your local library isn’t too far, you could go there. Most public library’s have events or clubs they host, ours has it all on a corkboard near the door so people can see what’s coming up. If you pick one, you know what the other people in it are interested in (for the hours they’re at the club or event anyway) and you can use that as a starting point. If one club or event doesn’t work for you, try a different one next time, you’ll most likely meet a whole new bunch of people with a different topic of interest.