I would suggest for the crowd here: tech meetups, even online ones and communities will connect you to people with your interests.

Another thing that you'll likely find in your area is a chess club.

Maybe you won't love the chess itself, but it's an excuse to hang out with people.

Another one is volunteering work. Elderly, dogs, etc, many communities need help.

In my village I have started a "clean up" program where average citizens take few bags a picker and we clean areas of our village.

Most of people are "this is the job of the garbage collectors, the mayor should do it", so what? It also costs money, and nobody will do as carefully as the people living there.

Even if 95% of my village won't care few will and we make an impact and socialize, etc and more start taking part of it.