Learning from textbooks or learning from open courseware (such as MIT's proper courseware)
Which is better?
This. If you can't independently derive the laws of motion and thermodynamics and quantum mechanics using nothing but a 1kg block and the Calculus, you'll never get anywhere in science.
You know you can just go to lectures at a university, right? If you ask the professor if you can sit in their class and learn for no credit, they most likely wont have a problem with it. They might not even care if you're a student at the school or not.
Education is completely in the hands of the student. If you fail to take advantage of it, it;s on you.