Sorry. Perhaps the thoughts were not clear, but have watched a lot of videos and even Wikipedia makes it seem like they are all social networks and that one can follow / post / reply on the other networks:
It isn’t about following everything and everyone, but about not wanting to have a Pixelfed account to follow a photographer, or not needing a Lemmy account to follow interesting topics, or not needing a Mastodon account to follow a blogger / writer. It is perhaps then a bit oversimplified on the “intro to the fediverse” videos / posts that’s been seen on the web. Was hoping to have one single account on any of the above, and then just interact from there, and not needing an account for every single one of them.