What to read for a quick introduction to PrestaShop from an engineering point of view?

Question

Prestashop

There was a task to understand PrestaShop. Advise what to read in order to quickly understand its essence from an engineering point of view. Understand the structure of the device, ideology, important practical nuances. Without extra water for "dummies" (my understanding of web technologies / languages ​​is almost exhaustive and I can read the menu, so I don't need to explain where to poke to start a product), but in human language, "right off the bat", but without the routine listing options.
I’m not going to program my modules yet, the tasks I’m facing now come down to installation, fine-tuning, some finishing of ready-made themes for myself and the like, if there are any questions about specific APIs / options, this is a separate matter.
The search turned up a very close question, but mine is still different: I don’t need “details about each function” at all (on the contrary, at this stage I need a clear understanding of the general “skeleton” and some general specifics) and I don’t have such a rigid language framework - English (as and some other languages) would be more than satisfactory.

Answer 1

Damn, read her code, she's open source, no water, just understanding.