I skimmed some of the posts and saw ADHD mentioned a few times - damn, we're crocheting ourselves a new stereotype. 😝
I have a friend who crochets a lot, and while we were at her house, she'd be working on a project of some kind. Eventually I got curious, so she handed me an old ball of yarn and showed me the double-stitch. That's still the only one I know. I've made several blankets using just that one over and over and over.
I've learned how to change colours okay, so I can make patterns by strategically swapping to different yarn, but if I really want a certain pattern, I just crochet over the surface with another round of that double-stitch. It's like a 3D thing. :D
And yes, it does keep my hands busy!