It's gone quite smoothly so far - found an instance local to me and joined, subscribed to a bunch of communities, installed Jerboa and set it up - didn't hit any roadblocks.
The cross-server subscription thing is a bit counter-intuitive, but this seems to be an issue that people are already aware of. The Fediverse lengthy signup ritual of choosing an instance is there, but that's just a feature of how the medium works and I'm already familiar with the issues from Mastodon, so it didn't bother me.