Concepts
The pages in this section describe how Net is put together — the mental model you need to write code against it, and the reasoning behind the pieces you'll find in the API.
Read Architecture first. It frames the three-layer model that the rest of the section builds on. From there, every other page goes deep on one of the layers or one of the abstractions that sits across them.
You don't need to read this section to get something working — the Quickstart will get you running in minutes. You'll want to read it before you make any non-trivial design decisions, because the abstractions in Net are unusual enough that intuition from other systems will mislead you in places.