This is what is seen at the links suggested:
This is a list of features, not how to use them-
There are too many replies here for it to be “quick”
These are great, but not the place to start:
These are not “quick”. There is too much to wade through for these to be quick. What is needed are some basic examples of how to implement Agenda for a few basic purposes to help folks get started easily while introducing Agenda concepts, features and abilities.
This is an example of a good intro page: https://help.sketchup.com/en/sketchup/getting-started-sketchup
I know you are not as big as Trimble (or @Last) and I know these are very different apps, most specifically, SketchUp has files you can toss if you mess up while playing to learn, which is all the more reason Agenda needs to develop quick starts that get folks started down a good path from the start. The forums should be for further exploration, not a place to start.
I’m betting the lack of clear initial direction keeps a lot of people from hanging around. The website and app should have a “start here” feature, so people experience clear productive success early, rather than confusion about how to get started.
You might need to hire someone outside, who doesn’t know Agenda intimately to create this, so they’ll experience the process as a relative newbie.
All just my humble opinion.