PS4 as Renderer for Blender

I’ve been blendering for over year now, and could probably do way better stuff than I’ve been doing if I had a better/faster computer. I’m currently using a MacBook Air 2017 and I think that there’s a lot of room for improvement. And I don’t want to spend a whole lot of money on a PC because my interests change a lot. And I already have a PS4 won’t be needed any more.

Could a PS4 be taken over in order to use it as a PC? Or like a graphics card, I guess. I don’t know anything at all about the hardware in CGI.

And another question. On my laptop, should I use my GPU or my CPU for rendering? I seem to have an Intel HD Graphics 6000 graphics card.