I know there's a bunch of different ways to solve the cube, and I've looked at some of them, but what I'm trying to find is a solution that involves solving two opposite sides first. I remember a friend when I was a teenager working to learn this solution from a book, at the same time I was learning my own solution, also from a book.... yeah, this'll date me but it was before the age of the internet when the cube was new LOL

Any help would be very much appreciated