I have this random thought that there's something very important and often overseen in what you've said: "(...) knowing (...) what not to learn (...)".

We live in hyper-information times where there are multiple options for pretty much everything. This often leads to too-much-choice-paralysis. Learning how to deal with it may be very important skill.

For new programmers "simple" things like the choice of programming language, framework, style, whatever - can be overwhelming. It seems to me that often people go for dogmatism as a "tool" of choice for fighting over-information.

Learning how to evaluate things quickly, making a choice without falling into dogmatism hole, being open to other ideas and above all making steady progress are becoming, imho, essential skills.