The key to shooting a bow and arrow and group your arrows within an acceptable area, is consistency.
It doesn’t matter if you have the world’s best sight on the market, if you can’t shoot consistently, it won’t matter.
The key to consistency is, practice.
One of the things that you will have to get used to is anchoring.
Anchoring is putting a part of your hand to a point on or near your face.
I can’t tell you how to anchor your draw, but I can tell you how I anchor my draw.
I draw back and I always have the second knuckle of my pointing finger a anchored on the corner of my mandible.