Q: What's the recommended order for taking End-to-End Machine Learning courses?

A: Start with whatever you're most curious about and go from there.

For the most part the tutorials are intended to stand alone. Where there are prerequisites or recommended preparation, I'll note that in the introductory lecture, like this one for Course 312 on building a neural network framework. The introduction is always available for preview so you can see what's coming before you sign up.