I'm currently using 10-12 mods and have been since EA. They all work just fine and have all been updated since the game released.
Adding mods to BG3 with BG3 Mod Manager is about as simple as I've seen in any game. With 98% of the mods you just drag a .pak file into your mods folder. Fire up the mod manager, drag the mod from the right to the left panel, move it up or down in the load order if needs be, once your are happy click the 'save load order' icon and get the green message at the bottom left of the mod manager and you are good to go. At that point you can either start the game from the mod manager or close the manger and run the game from a desktop shortcut as I do. If I recall correctly, running the game from the launcher involves a further step.
Full Release Mod Fixer (FRMF) works as intended. It is one of the 2% of mods which do not install as outlined above. Once you have dragged the .pak file into BG3 Mod Manager and fired up the MM FRMF will be at the bottom left in the override section. You just ignore it, save load order again and either exit the MM or start the game.
Modding any game requires a fair bit of reading and thinking.
