

Since you are already on Mastodon, I would start by checking out the instances of people you have interacted with. Many topic-instances are still pretty general-purpose. Decentralize yourself! Join two or three instances. Subscribe to different topics on each. See what sticks.
On a small instance, the local feed is much more important. Local users have a larger influence on what you discover. So, check the local feed first. It may be a bit boring but should be free of spam. Check the external feed. It should not be too tacky, and have a CW where you want one. Check the moderation policy. If you want to commit to only one small instance, find out who pays the hosting and maybe donate.
I may have created two accounts when I got here, and I will be baited into replying to snarky comments only from this one! I also like the low-key split-personality feeling, and experimenting with a different set of subscriptions. Anyway, so I’m no content-generation machine. But I’m doing my part, trying to keep up the signal-to-noise ratio!