I am assuming, entirely without proof, that you've already designed (or are designing) the database, and what's needed is a cogent overview of scope, purpose, structure, etc.
If that's the case I should be able to help. I have experience explaining such things to techies, management, users, students and instructors. With any luck your audience is in there someplace.
Please chat with me before committing, so we're sure I am on the right track.
David