I’m retired Army Guard.
Why join a band when she wants experience treating folks? Why not join a NG or reserve unit that is a medical unit? If there are none local (check with your NG or reserve recruiter), perhaps there are some units with medic slots open. Also, many major headquarters will have staff slots for professionals, lawyers, doctors, etc. Once again, check with your local recruiter.
One more thing. You don’t have to live in the state where your unit of assignment is located particularly if you’re in a high demand field. She should check around in the states adjacent to Maryland as well.
BTW, we had a reserve hospital unit in North Alabama.
Her HS buddy is the band director so I guess she thought joining the band would be a round-about way for my cousin to get into the medical field after training.