Same here. I played a lot more games in my teens and 20's than I do now. I also prefer games with less of the "you need to read the guides and watch tutorials before really groking things" type of games these days.
Factorio is actually really well designed that you don't need guides or tutorials to "beat" the game imo. Sure, there's guides and tutorials if you want to reach peak efficiency, but that's true for any game.
Factorio is extremely approachable. There’s no need to refer to outside materials or guides at all. There’s nothing hidden. All the information you need is right there in the UI.