@Collinb, you can try Finasteride and Minoxidil, I personally don't like the Propecia pills because it hurt my libido, so I'm using topical formula without side effects.
21 years old is way too young for HT, you need to wait at least you'll be 24 years old, you'll be NW6 in the future and we need to make sure your DHT won't effect your donor area as NW7.