The main hurdle in explaining the #fediverse to people coming from Twitter is that they're accustomed to a singular, self-contained instance in which their posts are disseminated across the whole instance. They are thus far more statement-focused. In the #fediverse with its multitude of instances, relations of dissemination are conversation-based. (Follower relations make instances and accounts seen by other instances.) The differences in technological setup explain the difference between "scream media" (Twitter) and "social media" (Fediverse). We'll see how newcomers will handle that.