The server is whitelist only. Send your exact Minecraft username to one of the server admins and they'll add you.
Wildlight Hollows runs Minecraft Java Edition 26.3. In the launcher, pick Latest release (or 26.3 if a newer version comes out before the server updates).
No mods are needed on your side. The server uses Fabric for its own extras (like the live map), but a normal unmodded game connects fine.
Bedrock (console, phone, Windows Store edition) can't join.
Multiplayer → Add Server, then:
feral.playit.plusUse mc.local (or 192.168.1.137) instead. It's faster and doesn't go out to the internet and back.