How to 'really' learn SRP ?



Also the insert picture option does not work

Original SRP explanation render/draw/feature oder queue/event/feature/thing explanation video is completely outdated (

). How do I ‘really’ learn to set up an SRP?

Randomly clicking around until one of the 20 to the power of 5 permutations of possible options and parameters approximated the desired result is just not sustainable development practices.

Learn what from SRP?
Making your own?
Rendering path?
What settings does what?
Render features?
Shaders?
Batching?