Staff interview

Being a member of this sub inspired me to chase my passion of football deeper, and I decided to reach out to the local high school head coach. We had a short phone call and then have set up a time to meet in person next week. He said we would draw some things up on the board and talk ball. Full transparency (I let coach know as well), I didnt play football and haven't coached before. I started studying Oline play, and understand covered, uncovered, the gaps, some basic run schemes, but that's about it. What are some things I should do to prepare for this interview, and what do you think coach is looking for? Thank you!