Internet forums are disappearing because now everything is Reddit and Discord. And that's worrying.
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You should definitely start creating content and communities! It's a lot of fun.
I'm currently establishing a new Lemmy instance and it's fun as hell. Especially since it's a lot easier to build communities in this Reddit like format than in any other. I simply post content I see and want to share into the appropriate communities and discussions will naturally follow. This can also be original content of course.