Hello, I want to know how I should continue learning physics, but first i will give some of my background. I'm 17 years old and I like physics. I decided that in order to learn physics I need to read books on physics. So far I read over a dozen books, few of which are The Great Physicists From Galileo To Einstein and Mr. Tompkins, both by George Gamow, Hyperspace and Parallel Worlds, both by Michio Kaku, The Dancing Wu Li Masters by Gary Zukav, and In Search of Srchodinger's Cat by J. Gibben. Some time ago I came across The Feynman Lectures on Physics and noticed that I could not understand any of the math, which I think is calculus, so I started learning calculus by reading Calculus Made Easy by Silvanus P. Thompson. I am almost done with the book, but still need practice on integrating, and my question is whether I have enough knowledge to understand or at least read through The Feynman Lectures and if not what books should I continue reading to understand the math needed for physics.