/ic/ - Artwork/Critique

>>3554583
hi,
i started reading scott Robertson, holy shit that's pretty interesting and looks helpful, but to be honest:

I don't understand anything.
But I want to!!
What is a cone of vision, what am i supposed to do with the camera analogies, why is there an explanation on how to "find" vanishing points?
When do I have to find them? I thought I create vanishing points?
Sorry for asking so stupid questions, but I feel so fucking irritated right now and really, really want to understand the book.

(I added a study i did to this post; so now you can`t complain about beginners who don't post work)