Ok, jeeze..... where to begin?

This is the question. Is there no conceptual, introductory explanation of ZenCart? I've been looking and can't find anything. Sure there's a horde of information bits... but has anyone attempted to cover the basic conceptual introduction in a manner that limns out the terrain?

I see in the Faq Section the entry "What Every New Zen Cart User Needs to Know". And yet underneath this is the bewildering cavaeat "Please read 'Template Customization/Building Overrides' before starting this section". The comical nature of this ... well, it should be addressed.

One wants to know some basic facts, presented in a reasonable pedagogical format. I dunno... clearly, unless I'm missing something, nobody understands what I'm talking about here. If I figure this thing out, perhaps I can contribute.