Once the devices have been added, and the user is ready to create some rules, the best approach is to start slowly with preloaded Basic Rules app.
There is nothing basic about this app, it can accommodate many different use cases. It is a good introduction to Hubitat's web interface and the app provides easy to follow logic. It starts with an "event" (trigger) then builds the rule gradually (E.G. when this happens, I'd like to automate this device, then this other device).
Check out this video for more details:
