I think that the fediverse is in its infancy at the moment (what a time to be here), but when/if things mature there will be a lot more structure and resources available. One example is that you might join a server with instances of multiple services running on it (Lemmy, Mastodon, chat etc…) which will help make some sense of things and prevent the confusion of juggling a bunch of accounts (ideally).

In the short term though, the best one-line explanation I’ve heard is to “think about it like email: you can sign up on an email server and chat with people, but you can also chat with people on other email servers.”

I think the target in the very short term should be disenfranchised power users (most likely starting with people who have a strong interest in technology) since they will be able to contribute feedback, development, and other resources to progress thing.