What would you recommend a vibe coder learn about how all this works?

I'm a writer who started building with AI coding tools about 8 months ago. No programming background. It's been one of the most fun things I've ever done.

I want to understand more about what's actually happening. What are the big concepts that, once you get them, make everything click in a more interesting way? The stuff that made you go "oh, THAT'S what's going on."