You can get an excellent ConfD “Getting Started Guide” here:
GETTING STARTED WITH CONFD
Welcome to the world of ConfD on-device Configuration Management.
This Guide’s aim is to quickly bring you up to speed with ConfD, both on a hands-on level as well as understanding it’s architectural principles and how it fits in with the surrounding world.
It covers the ConfD Premium parts too, and is great resource for both ConfD Basic and Premium users.