Thanks for all of the help! It turns out it was all for nothing,
From the standpoint of getting hired, yes. It was all for nothing. Yet, you are now better prepared for next time. You have interview experience.
Now that I am out there selling myself, I am subject to
auditions. Most actors and voiceover people have about a one in 25 ratio. That's 25 auditions for every time you book a paying job. Each one makes you better prepared for the next. You have to see them as an enjoyable part of the business, or it can make you crazy.

Some people audition 100 times before they book a job. My average has been about one in ten, which I consider to be pretty good. The job I did yesterday as a model didn't even require an audition. It ususally doesn't work that way, though.
As you prepare for your next interview, you can think of it as going on an audition. The part you are up for is "pilot", and you know what the job entails, so you can cover as much material as you like as you prepare for next time. Regs. Sim. Airplane. Positive attitude.
Next time, you may book the job, and be the star.