Don't give them a open-world game. BotW and Horizon are terrible games for people completely new to a controller and who need some guidance to start playing. Light content, like Life is Strange, Minecraft, some Telltale games are all welcome so the person is not overwhelmed with things to learn. Heck, first time gamers don't even know the controller layout. From this first few games, which either has a clear objective or no objective at all the person playing can get a grasp on the controllers while enjoying the experience, you move to more skill demanding games (not Dark Souls), like some platformers and action-adventure and watch them become the beautiful butterfly you nurtured. Remember to know what the person's taste might be. Some might hate slow games a la Telltale.