There are lots of hosting services out there that can do this for you. One thing you might want to determine first is what kind of modded server you are looking for. There are lots of modpacks out there, and it's also possible to create your own with specific mods that you want.
It's older now and there hasn't been any new content for some time. The Hobbit films didn't seem to have as much impact so it's likely just time causing people to lose interest.
An unexpected source of Tolkien discussion is actually YouTube comments. If you can sift through some of the memeing, you can find people who have read lots of the lore discussing background of some of the scenes.
Here's an example:
I decided to progress up through Astral Sorcery early. It has some interesting abilities, including the perk tree which seems like it was modeled after Path of Exile.
Hi all,
I'm starting up a new Minecraft world if anyone is interested in joining. It is a server based on FTB Revelation with a few added mods of my own. (https://www.curseforge.com/minecraft/modpacks/ftb-revelation)
The assembled package is here and you should be able to launch it with...
I only play modded Minecraft. Usually whatever Direwolf20 has out lately. I like building machines and automated systems. Can't do actual design worth a crap.