RE: Where to aim?
I will second on Brian Sorrell's book on "A Beginner's Guide to Traditional Archery". Follow the practice excercises exactly as stated in the book. As Bob and others may have stated, there are different aiming methods. "Instinctive", Point On, and Gap. I don't pretend to be any one of them myself. I use components of all three depending on distance, the targetand situation.