Could you make a self-service system with some on-screen guidance as an option for users to have an easy time operating the Photo Booth on their own?
The current features can work for somebody who has used the service before, what with the X button they can press after capture and the retake option after session, but it is easily missable in the moment.
Events where prints automatically come out tend to have more wasted print media and unnecessary uploads when users don't like the session, and end up re-taking photos. But an option for users to be prompted to take each photo and then press to continue/retake after review could be useful.
Perhaps large buttons side by side with something like "Auto-start session" and "I'll start each photo"
Small description under each option like:
"A fast, 5 second countdown, 5 second review prepare props and poses before you start"
and
"Start capture and review every photo on your own for more control"
