DRG is a fantastic place to start with moving from a controller to mouse/keyboard.
I would personally T-up some classics like portal and Half-life 2 for solo “history lessons” after that. Only then would I make some harder recomendations like long RPGs, MOBAs, 4X, and would shy away from MMOs unless you have an organized group to introduce them to.
It has a 3.5mm headphone jack, look how brave they are \o/