IMO, Udacity is much more interesting than Codecademy. Codecademy relies too much on exercise repetition.

Can you elaborate on your experience with Udacity?

I've taken the Codecademy javascript course, and while I came out of it with the absolute basic fundamentals, enough to where I could play around with the language myself, I wish they'd gone over a bit more of the theory behind the code. At times I felt as if I was simply going through the motions to get to the next challenge. I thought Codecademy was just a bit too simple, which is why I'm interested in the Udacity courses. Still a great starting point.

I went through Udacity CS212 and thought it was great. I have to say, I already knew some python, so I'm not a total beginner, but it was presented in nice bite sized pieces so you can do a little every day (which is my preferred method of learning).

CS101 was great, taught by a CS prof so plenty of basic fundamentals peppered in on top of a mostly practical python course.

Doing simultaneously. Udacity has less glitches. Codecademy hangs from time to time. Lots of traffic? Udacity also is longer and has more theory.

But.... Given the time and focus, Codecademy will catch up.