Run away from integrated graphics, too weak to run anything.
I learned Blender (a 3d modeling software) when I was 16-17, that was really freaking hard because youtube video tutorials weren’t a thing yet. It’s now easier to learn things because of free online video training, but you need to have an awesome attention span which many 12 year olds don’t have unless they have real genuine passion and drive.
But it’s not just Unreal Engine that he’ll have to learn, he needs to learn a modeling software if he wants create his own characters and props. It’s a huge endeavor, but there’s tons of discipline and personal growth that can happen from simply striving to build something.