The help is voluminous and really quite wonderful (all the examples are executable). Just go to the documentation center and explore until you get tired. And re

The help is voluminous and really quite wonderful (all the examples are executable). Just go to the documentation center and explore until you get tired. And repeat a couple hundred times. It's like reading Wikipedia. At least, exploring is how I learnt it. These video courses also exist and are all free: http://www.wolfram.com/training/courses/ http://www.wolfram.com/training/courses/. I haven't tried any of them, but they're supposed to be quite good.