Thanks. It sounds like you're the kind of teacher I would have loved as a kid. What you say about abstractions vs. concrete examples is 100% accurate. I appreciate your suggestions.I work as a teacher, and I hope none of my students has ever thought a mean-spirited one. The difference in learning from concrete examples versus learning from abstractions and generalities (a rule, a formula) is a difference a lot of learners have. A lot of instructional material fails to support that style of learning.
As soon as you want to know how much current is running through a resistor (for example to bias a tube), or how much voltage is dropping across a resistor (for example to know why the first dropping resistor in a Champ is 10k Ohms and the second dropping resistor is a 22k), then you can use Ohm's law. It can be question/curiosity-driven, and it can be attached to one particular moment of curiosity, and never mind if you end up asking the same kind of question a bunch of times. Memorizing the general formulas or reading through an entire chapter of a tube amp textbook and forming an abstract understanding of the topic can be a really heavy lift for anybody.
Since you're self-motivated, there's no time limit, there's no need to learn efficiently, there's no quiz or people to impress. A question as simple as 'What would changing this coupling cap here do?' opens the door to some really useful stuff, and a person can pick how far to take it.