The hardest part of shooting traditionally, at least for me so far, is being consistent. Anchor point, drawing method, just by repeating the shooting over and over you gain the muscle memory and the process becomes ingrained. Picking a small spot is extremely crucial. Aim small miss small! Shot cross dominant for awhile, and became proficient. However, contrary to what Duane said, sometimes I would catch myself gap shooting. Of course I also canted the bow to nearly 45 degrees so the arrow was in line with my dominant eye. The main thing is don't get frustrated, it takes time.

Good luck