What I want to learn: thinking in array languages. Have been curious about them for a while, but over the holidays went through Advent of Code in K/Q. Without

What I want to learn: thinking in array languages. Have been curious about them for a while, but over the holidays went through Advent of Code in K/Q. Without much prior knowledge, some of my solutions ended up distinctly awkward, but for some problems the solutions just fell out. Reasonably sure that the fraction of "just falls out" will increase substantially given a some more practice... What I probably should learn: how to sell. Increasingly clear that it's something I'm going to need in the next few years whichever path I take. Something that leaves me pretty nervous though (and some of the obvious ways to try stuff out, like monetising side projects, may be awkward in the context of $day_job).