IMO set him up with some of the modern engines and tutorials… Godot 4, Unreal etc…
actually if you are looking for some stuff to have ready for him.
If he has access to youtube there’s also lots of really good tutorials etc… out there. Heartbeast has some awesome ones for godot etc…
Considering that’s a percentage of steam users… I do believe mac/windows is what’s actually counted against. Unless I missed where steam can be installed on an oak tree.