How to mod Crusader Kings 3Īside from one external download on Github, every mod is grabbed from the Steam workshop. But picking a couple and rolling your own royalty should be fine. The developers are pretty active, and there can be some lag between the game and the mods that follow, so I wouldn't download every file linked in this list in a single game.
A lot of the more extensive mods are still heavily in development, so I've steered clear of most total conversions (aside from one that I couldn't not highlight) and stuck to more general upgrades and rules for your kings and queens.