RE: Guidance to get started as an Integrator
Andrew,
Lets start with the fact the backend of Guides is a PowerApp and what I am about to describe is (1) its been a while since I dove this deep, (2) I have only lightly tested, and (3) its lite on official Microsoft documentation.
I believe you have to have administrative access moving forward as an FYI.
If you start by going into your Power Platform Admin Center and find your Guides Environment. This will take you to the screen which has more information regarding the Guides environment. On the "Details" panel specifically click on "See All". This will open a left side pop out panel where your "Environment URL" will be listed. Click on your "Environment URL". [FYI, i have not found this documented ]
This should open a new tab in a power apps, revealing the backend of your Guides that you have created. From here you can select a specific Guide and delve into it.
Here is were my testing get's lite because I have not tested this area a lot. You can create & adjust steps right from here, it offers Word templates, it has flows. I believe this where your integration stuff starts.
I hope you will share what you learn back in the forum