One thing that would have been nice to know as a newbie on the Fediverse:
The most common misconception, or at least from this side, was that they make it seem as if they all can connect and interact with one another. But this is not the case, as some work one way, some can only like or follow, others don't get notifications at all when tagged.
So have been testing over the past few weeks and made accounts on: a) Hubzilla b) Friendica c) Mastodon d) Kbin e) Lemmy f) Iceshrimp g) Bonfire h) Peertube i) Funkwhale j) Pixelfed
And just out of curiosity: a) Using Bridgyfed, to test interactivity between the AT protocol of BlueSky and AP protocol of the Fediverse. b) Meta's Threads for testing with Mastadon. c) Starting to test Nostr with its peer-to-peer network.
TL;DR:
The fediverse holds a lot of promise, but it the ideal level of interconnectivity isn't there yet. (And yes, not all of them need to be able to connect and interact on the same level of details as with the others, as they are different tools.)
We are the same person, OP and OOP. This is all part of testing as well. :-)