How to display subcategories in modX on miniShop2?

Question

MODX

Direct me on the right path, but not long ago I began to study modX.

There are three pages:

1) General catalog, where two categories of products should be displayed.
These categories have subcategories that should be displayed.

In general, the structure looks like this:
General catalog -> Subcategories 1 -> Subcategories 2 -> Subcategories 3 -> Product

In the general catalog you need to display what is in "Subcategory 1" I have two different ones

2) There is a page of one of "Subcategory 1"

They need to display what is in subcategory 2

Subcategory 2 -> Subcategory 3 -> Product

3) And on the main page should also display what is in "Subcategory 1"