[wruza]

None

Agreed.

work on code bases written by people that are much more skilled than you

Two problems here. First, you can’t really be sure if they are skilled or publicly confident. Although learning confidence is useful too, for the same reason.

Second, you can only see what they do, not what they learned to avoid. The best way to get better is to write your own code, assuming you’re at least fluent. That will teach you what to avoid and you also learn your general predispositions and code anxiety/perfectionism levels. Good reflection on that will improve you a lot. I don’t think just parroting someone’s code makes you better, unless you’re very beginner.