Does anyone know of a congregation space for #FediAdmin of small/single-user instances to discuss issues specific to them? Technical and social.

I know there is an oft-mentioned, oft-beleaguered, Discord for admins of large[r] instances, but frankly their issues seem entirely different.

Chat (vs Posting) preferred. IRC/XMPP/Matrix: good.
Discord... OK.

Other static-ish resources (e.g. wikis) also welcomed where they exist.

Boosts appreciated ♥.