The best way to learn anything is from a textbook.

You can learn on your own from an old textbook through self studying with a problem book, and it's truly the best way. This is coming from a college Sophmore in Engineering. We study and work through a number of textbooks and other resources, but honestly the best information is in textbooks. <br><br>There are also a lot of good resources for self teaching yourself anything. In my experience, videos are great for supplements, but you need a solid foundation, and that's where textbooks and writing your own notes down come into play.