Targets3D,
You are questioning yourself after only ONE afternoon???????
Be fair to yourself and give it a chance. All the coaches I know will tell you that if you don't work on something for at least twenty practice sessions, you won't be able to fairly judge a change in style or form. Nothing worth doing will be figured out in one afternoon!
POA and instinctive are closely related but if you were to ask me, I'd say start at 5 yards and work on just pointing your bow hand (your bow hand is your front sight, just point it) at a large target -- like a paper plate, or better yet no target just the back stop. After doing this for a while you will feel the groupings starting to get smaller then move back a little -- Like another two or three yards.
After a while too, you will start to be able to see the point of the arrow at full draw out of your peripheral vision and be able to reference it to a spot below the target. There's more but this will give you a starting point for weaning off the sights.
As they say, if you could do it in one afternoon, and it was that easy, anyone could do it and then what would be the point or challenge?