A few niche examples:
/r/generative /r/musicians /r/wildernessbackpacking /r/tropicalweather /r/analogcommunity /r/heavymind
Good luck convincing the non-technical users there to come here. This place is currently great for interests catered to programmers and sysadmins (speaking as one!), but artist and hobby communities are seriously lacking.
Lemmy’s Docs are pretty good.