If the fediverse is to be adopted by the masses, the onboarding experience needs to change. A new user can’t be presented with a choice of instances as part of signing up or at least the process of making the choice needs to dumbed down a lot. I don’t know how or if this can be solved, I just know as someone involved in app development and UX that the current experience won’t work.
My mother would not know how to handle this paragraph: “Lemmy.world is one node in a network of hundreds of Lemmy instances. Before you sign up here, take a moment to explore all the instances at https://lemmyverse.net/. You may find an instance with a regional or topical emphasis that speaks to you! Don’t worry about being left out; Lemmy instances are interconnected so users from each instance can participate with communities on other instances.”
For mass adoption it needs to be so simple that even non-techie older people can get through it without feeling like they might be doing something wrong.
If people can’t understand what federation is then just send them directly to .world or lemm.ee or another big instance. If they have common sense then send them to join-lemmy and let them pick an instance. If someone is unable or unwilling to learn a very basic concept then they probably are not going to be a very good neighbor to have on the fediverse.
I agree that the discoverability of communities needs improvement. I think that most instances should add starter pack like features with the most popular communities for people to choose to subscribe to when onboarding new users.
In my opinion, finding the right and active communities to subscribe to is the biggest onboarding hurdle, not picking an instance. If picking an instance is a hurdle, that person wasn’t willing to try another site in the first place