Some games lend themselves better to modding. Some are much more complicated to mod. Some games need a mod manager to do conflict checks and some games can just have mods piled on top of each other endlessly without issues.

Mods within certain game engines can pretty much be moved between games ofln the same engine often with very little adjustment.

I would say in modern modding it is usually fairly straightforward, but some games and some older mods definitely require some deep computer fuckery.

Stick to things you’re comfortable with and skip the ones you aren’t.