One year out of my bootcamp and the thing that helped most wasn't a course, it was writing down what confused me

Took two more courses after the bootcamp ended, both fine, neither moved the needle much. What actually stuck was a habit I started almost by accident: every time something confused me at work, I wrote one sentence about what it was before looking it up. A year of that is a pretty honest map of exactly where the gaps were, and most of them are closed now. Cheaper than another course too.