There are quite a few Christian Colleges with harp instruction. To name a few, Gordon College near Boston, Luther College in Iowa, Augsburg College and Macalester College in Minneapolis, Eastern University or Villanova near Philadelphia, Manhattan(ville) College in New York, Marymount Manhattan College in New York. If they don’t offer it, it doesn’t mean you can’t arrange for lessons with a teacher. Lots of schools have scholarships, especially Ball State in Indiana. It should help you as an enrichment with any school application. But you need to study with a very good teacher and work hard, and learn a lot of good pieces. A Christian school isn’t the only place where you’ll get a good Religion department.