@fireweed@urusai.social @licht@mk.luna.se.net that, or subscribe to a relay, but they can sometimes not be moderated as strictly as you wish they were.

i personally started fedi with my single user instance, just following friends who i knew had a fedi account, and sometimes following the people they reposted, liked, or replied to.
basically starting with an echo chamber and slowly networking a way out.

i think it worked quite well, i don't have a very active timeline, but i know most of the thing in there will be things i loox for, and i feel less like i'm gold digging interesting posts like i could be doing on a big network without algorithm.

but if you like having lots of content, you can subscribe to relays. i think sakurajima has one for example

also maybe you can ask your instance's admins how they did the bubble server thing. i know there are ways to follow a full instance through instance actors but it is often a bit clunky