The OP has already told us that the shop is not insured by DAN and that is not an option.DAN has a student diver insurance program the covers the student during their OW class or basic training that is free to the student. The shop or instructor that is insured through DAN signs them up for this coverage and the student can upgrade to a regular membership if they like after they are certified. The student can't sign up on there own for this program only the insured "business". This was something we used to explain to students before online instruction took over the classroom portion of OW.