The documentation around it isn't that great. Once you know the key actors -- which are a dozen or so key types of resources, and how they play together, you understand how to create the configuration for your environment.

The YAML files are quite intimidating at first, if you look at examples out there.

I'm probably not a great teacher, but I think I could boil it down to a slide deck of no more than 25, and an hour's worth of time, and clearly teach how to interface with Kubernetes for a basic web app w/ horizontal scaling, Let's Encrypt SSL certificates, etc.