I’m a West Point graduate and one of my colleagues is a Blue and Gold officer for Annapolis and a graduate. As noted there are some pretty big barriers to attending USNA and concurrently attending seminary courses. One suggestion would be for you to contact the Chaplain’s office at Annapolis and speak directly with a priest or rabbi or minister about how they got to where they are at today. What does happen though is Academy graduates after their initial service commision complete coursework in a seminary and begin what amounts to a second career.