I found a simple cozy SMP that is semi vanilla and runs on Java.
It feels like a straightforward place where you just join in and play survival with other people. The whole point is keeping it cozy and easy to get into.
Cozy Semi Vanilla Java SMP

GG.MINEWIND.NET New Server IPTHE OLD AGE Modded Chill Start
Beginner friendly serverno-grief policyRelaxed server vibeRespectful players onlySocial survival play
I found a modded Minecraft server that is built to be noob friendly and chill. They say no toxicity so it should feel safe to learn and play.
The server is not fully started yet. It begins once 25 or more people join so it feels like everyone gets a fresh start together.
GG.MINEWIND.NET New Server IP
