A lot of women I know who aren’t the typical “gamer” type really enjoy Stardew Valley. It’s a little farming game where you live in a town, foster relationships with the townspeople, and generally go about small town life. Very cute game, especially fun with friends.
Also Minecraft, it’s very open ended and there are many ways to play it.
As for how to start, an affordable laptop will run both of these fairly well, if you want Nintendo games you’ll probably have to get a Nintendo Switch.
Definitely make a Steam account though, you’ll find pretty much all the games you could want in one place there (Minecraft is separate).