As for interesting public chats: Quite a lot of the free software community is on Matrix these days; check out projects you're interested in and see if they have a Matrix link.
For example, the NixOS community has a curated Matrix Space linked from https://nixos.org/community/index.html with lots of rooms to explore. GNOME, KDE, and Mozilla also have a significant presence on Matrix.
For example, the NixOS community has a curated Matrix Space linked from https://nixos.org/community/index.html with lots of rooms to explore. GNOME, KDE, and Mozilla also have a significant presence on Matrix.