I definitely agree with a lot of what has been mentioned above. For me, when I've learned the most efficiently (for lack of a better term), it's been when I approach it with a specific strategy in mind. For me, that's generally been buy and hold. So, knowing that, one can then focus on what points really matter in relation to learning that specific niche. Things like rehab costs, market rents. And, if you're BRRRRing rentals - ARVs, rental vs. flip finishes, financing/refinancing options, etc. As I go, if I have questions about anything related to those topics, I research online or ask in forums like those here on BP. So, it really is a piece by piece, or measured as you mentioned, acquisition of knowledge.
There really is an overabundance of information out there, so this has definitely been the most beneficial and productive way for me personally. I've certainly gotten myself into trouble when I've been more sporadic haha.