The DC team have done a fantastic job with the latest kickstart but the learning curve for non Drupal users is still high.
I needed to clearly explain the demo capabilities to my user, for example how the product variations, product variations types and displays related to each other. I also wanted to be consistent with terminology. To do this I created a few powerpoint slides which tell the product part of the demo story with pictures and screenshots.
My user and I found the process useful and I hope you may find them useful for your project.