Part of it is learning, but it's just as much coming into the right mental models for it.

Programs are just virtual machines assembled from numerous smaller parts, not so different from a bicycle, car, or mechanized assembly line, but that's not at all how I thought of them when I was first getting into writing code. I'm not sure I even had a mental model at that point, or if I did it was too simplistic to build anything useful with. It was after my mind picked up the machine model when I started to become capable of writing code and eventually designing and build software from scratch.