Jamroom - in the flesh and blood
Off Topic
There's still more division possibilities even after you've settled on "non-developers" as your chosen target audience.
Are the audience going to be ADMINISTERING a jamroom site or using it from a 'member of the site' perspective. If its administering, then the concepts that are hardest to get you're head around are the separation of USER, PROFILE, QUOTA in setting up the system.
Docs: "Jamroom Admin Handbook : Table of Contents"
https://www.jamroom.net/the-jamroom-network/documentation/jamroom-admin-handbook
It seams like you'll be talking to members who will be using a site that you and steve have setup, so that link's probably not so relevant to them.
For you're case how you've setup the system rather than what the system is is what you'll be explaining. Explaining that there are different types of profile ('how you've setup the quotas') and what each one is for. Their similarities: each profile is the canonical home to any piece of content albeit that piece of content can be shown in other locations on the site.
Some profiles have different things on them ( modules via quotas ) but they're still profiles. You'll be focusing on the flow of using your site to achieve goals. Hopefully the site gets out of the way all together so you can just focus on the goals of the site which is getting the user to understand the subject matter i believe.
Saw some of the modules stevex made to extend the Docs module, real cool.