Yup, you just make an account and you're there, like everything else they e ever signed up for.

The fediverse is too obscure for the average person to just jump into from Twitter. You can explain it as simply as you want, as soon as you say words like server and instance, or even abstracts like comparing it to email, they'll have no fucking idea and their eyes will just glaze over.

Bluesky is singularly cohesive, one account, one service, like every other account they've ever made anywhere else. The people still on sites like Twitter are those that don't want to learn, they just want to consume.