I *love* lynda.com‘s courses. They are included free from my local public library system – http://hclib.org.
And – this Lynda.com Markdown course is very good. Great, even.
However: I am ANGRY and ANNOYED that Markdown even exists. What? Yet another markup language? Supposedly dumbed-down – a layer over HTML?
I just don’t get it. Utter nonsense. Oh well. By the way: This is an excellent site for creating and editing Markdown documents: https://stackedit.io/editor