tl;dr: Fundamentals, then just enough to get me through that next step. In general, I take an iterative approach: learn the basic fundamentals for basic situat

tl;dr: Fundamentals, then just enough to get me through that next step. In general, I take an iterative approach: learn the basic fundamentals for basic situational awareness, and then learn enough to get going, and keep learning as I encounter roadblocks. Sometimes, if I feel like doing a massive deep dive into a topic, I generally allow myself to do so.