Yes.

Yes, after an introdutory free and useful by itself chapter/course.

Constantly looking for this kind of learning resource right now. I had a very good experience with this one: http://trysparkschool.com

In my personal case, as I'm learning to code from scratch, it is essential that the course do not assume too much about my previous knowledge. Check the Twitter course. It teaches me how to install everything from the most basic tools, like Terminal. It actually taught me what Terminal is.

I hope you do it, I very much need it. Get my email at the profile and please let me know if you do it. Good luck!