For example, I’m on Lemmy.ml and I’ve joined !photography@lemmy.ml, !photography@lemmy.world, and !photography@kbin.social. In this example, it’s not very different from the number of similar groups on Flickr but, in comparison to Reddit, it seems like the decentralized platform can be a little unruly.
How are you going about joining different communities and managing your engagement? Are you only participating on the community on your instance? Are you joining and posting in as many instances that seem relevant?
The way I see it, some communities will thrive and others will die. No need to worry about the mess in the process. For now during this early stage just post to all of them or pick one you like and stick with it.