If you want to share what you’re making, dip your toes into the water. Some communities will appreciate the self-promotion as long as you do it in a sensible way, and other won’t. Right now, some degree of self promotion is great because it’s new content, which the Fediverse needs.

Yeah, given the Fediverse’s much smaller amount of active users and its shorter history, it barely has niche communities nor a wealth of specific knowledge. Anyone who wants the Fediverse to be able to support that role that Reddit currently fulfills of non-corporate information has to know that there’s a very large road ahead and it needs active building.