Recently, I have been working on a training for application users which might be helpful to both users and new model-driven application makers:
https://www.itaintboring.com/downloads/training/ModelDrivenApplicationsforApplicationUsers.pdf
It is meant to cover model-driven application functionality from the user perspective. To be fair, there is a lot to cover, so this is not going to be absolutely exhaustive, but it might be something to start with. There are still a few missing pieces there which I am working on, and I’m thinking of adding a few practical exercises in the next few days (and a Quiz, of course), so there will be an update soon.
Here is what you’ll find there so far, though:
In fact, it is going to be part of the Power Platform training, but it may be helpful on its own.