As someone who's just starting out, electronics is the first subject I've studied where a given topic will be introduced and a core concept explained but the extensions to that concept are glossed over. This seems to happen to me constantly.
As an example, diodes will be introduced and described as a check valve, 0.7V drop, etc. The core idea of what a diode is in isolation will be explained quite well over a number of pages. But after that they throw a bunch of circuits with diodes in them at you with two sentences of description. Here's a voltage multiplier, a signal rectifier, a diode gate, a clamp, a limiter, etc with no more information about HOW it works, just what the net effect of it is. I find myself constantly having to find multiple explanations of the same thing.
I'm not sure if this is just a normal part of learning electronics or if I lack a natural aptitude for it. I still have fun when things are working. Sometimes it can be a bit overwhelming though when you're working your way through a 1500 page book and any given paragraph can spiral into hours of reading articles, watching videos, asking questions on forums just to understand how, say, a diode clamp works.