I mean even a lot of this circuit I still have trouble understanding:
I’d say beginners should focus on identifying components in any new schematic they see. After that, start to visualize where the current might be flowing in the circuit (for instance: how much current is likely flowing into Vin?). This one is tough because there are feedback loops as well, which is another layer of complexity. Do your best to read through some of the prose and see if you can understand what is being said. For as much in-depth content JW writes about, I always thought he did a great job explaining it.