How long until I(a dumby) can use AI to manipulate the code of a game so that I can make it something different? Like how modders do it?

I’ve always wanted to have Red Dead redemption 2 as a farming game. But basically you have Arthur and Mary living out their lives at a farm completing daily tasks.

Lots of other games too. There’s a game by Paradox that I really enjoy, and if it was tweaked a little it could be really good. It’s not worth mentioning the game because it’s not very good, but for whatever reason I enjoy it. I feel like lots of games could fit into this category.

It has to be dead nuts stupid easy for me to do it. Like basically typing the sentence above and telling AI what to do.