> learning string theory first is ... not that stupid

For a different look maybe check out Wolfram's Metamathematics, since it's arguably a candidate for a ToE. Or think about learning math by stating at ZF set theory. I think you might think this is fine at the beginning but are going to quickly hit a wall.

And remember that GA also has lots of limitations. Don't forget that just because you're advancing doesn't mean you've gotten to the beginning.