"I have a limited time"
You blagged your way through a job interview, didn't you?
You blagged your way through a job interview, didn't you?
It's sad that you assume the worst in people.
If you're already comfortable with the basics, then focus on one particular element and master it. The other bits will come over time. I recommend Kubernetes as a focus, given your list.
Keep in mind at all times that the infrastructure serves the business.
At least he is trying to learn now instead of pulling a brillant paula.