If you want to get non-techy users, then there is absolutely no need to even use the word fediverse or to try to explain what any of this means. If you want to help a friend get onboard, just send them a link to sign up on the same server that you use, or a nice general purpose server. That’s it. They sign up, they use it, and THEN they can start to learn about fediverse shit if they care to.
Soulseek has had my back so many times when I need to find a really obscure track that can’t be found anywhere else.