Topics are organized in the Table of Contents to the left. Topics are largely self contained, however I would recommend the following two sections as a starting point:
Dev Conveniences
The Dev Conveniences Topic covers some of the ways I use Python in Unreal:
In other parts of this documentation you might see lines that look like this:
This is covered in the Conveniences Modules section, I initialize my subsystems in one module and import them elsewhere as needed to reduce repetition, I'll try my best to avoid them in the code snippets but apologies if some slip through!
Assets
The Assets Topic covers ways to use and interact with Content Browser Assets and their instances. This is a core area of scripting in Unreal and it's definitely worth familiarizing yourself with that area first: