That's how many of us learn, by dipping our toes into a new SDK by copying and pasting into our bare HTML/JS page and tweaking things to see what happens. Eventually we will get around to reading the full documentation.
I have made d3 examples and played around with the toolkit since back when it was in its infancy (called protovis or something). It has definitely become more and more difficult over the years for a beginner to jump into.
(Background: I have met Mike since I got my PhD from the hci/graphics lab at Stanford, but we did not overlap.)