I've been on Beehaw and Lemmy.world for the past two weeks now and while people seem to be posting content that isn't about Reddit or Twitter or how great federated platforms are, such content does not receive as many comments/discussion as topics about the Reddit API controversy, or the current Twitter controversy, etc.
I prefer to sort by "new" when on the main page of either Beehaw or Lemmy.world. Most posts scarcely get a few upvotes and almost no comments. Without comments, I feel far less inclined to leave a comment unless there's a discussion already going on.
It feels like the gravity of discussion is still mostly centered on complaints and discussion about Reddit (or Big Tech in general), despite this platform being billed as a Reddit replacement. Hopefully that changes with time but there's a reason I haven't left Reddit yet.
It might seem that way (especially if you subscribe to the Reddit-discussing communities here; I did that at first, but got tired of seeing the same five convos happening a gazillion times, so I unsubscribed them, and that mainly solved the problem).
I went out into the community search, found a bunch of stuff I'm interested in, joined those places, and have been having some good interactions so far. So that's what I'd recommend.