Board game groups, trivia, coed pickup sports in the summer, Facebook social groups for any of your interests (hiking, gaming, book clubs, etc)
The only reliable way to make actual friends is be somewhere where you bump into them on a regular basis. If you’re a shut-in it’s not gonna happen.
I went to a board game meetup group for a while but never ended up having many conversations outside of what was needed for the games themselves. I think the facebook thing might have had something to do with it, the group organized mostly through facebook and people suggested I communicate with it but I am banned from facebook and don’t want to use it anyway.