Back on reddit, I mostly interacted with communities relating to JRPGs. There are some communities over here, but at most they post some trailers every now and then. There are also some more focussd communities about Dragon Quest, Xenoblade or SMT - all of them practically dead. I don’t think there is an instance.

I could go over to a programming related one, the german instance or even one of the vegan instances for secondary ‘interests’, but those aren’t things I often find myself posting about online to be honest. They seem to be mostly about memes anyways.