To anyone who's tried to learn (successfully or not) Node.js: What were your hurdles? What were your successes?

I'm doing some research for the Node.js Education Working Group (WG), and I have high hopes that this will be a good place to get some feedback.

So, have you tried to learn Node.js?

If so, what were the tools you used to learn? Tutorials? Courses? Mentorship?

What did and didn't work while you were attempting to learn it? How were those tools successful and how did they fail?

Thanks!