My priority is always to get my hands dirty and see what the process is like to get a simple webserver that responds with some hello world HTML looks like. So after setup is complete, I'd want a "quick start" page that is a numbered step by step saying "click this button, edit this file, push this change" and tada my app is up. Through that process, you show how to access your CI pipelines, how the CD system gets your app into a running environment, where the config for the app lives, and how I can access and view observability data.
Usually that process allows me to generate my own questions which I then answer with the docs.