Answer 1

Hmm, honestly, they're all pretty easy. Just a matter of sitting and reading it + practicing it. It isn't wise to base what you do in life on "the path of least resistance." You'll end up training yourself to avoid challenge/difficulty and seek out the path that's the easiest, which does NOT equate to being the BEST path.

Personally, I'd learn Javascript and NodeJS first, and the other various JS frameworks/libraries (jQuery, React, Angular, etc...)