Need to know your draw weight.
Assuming your arrows are corectly spined, you may have an issue with your rest. I don't shoot a fall away style so can't offer any advice there.
Most set the nock so the arrow is level or angled down just slightly so the nock is like 1/8" above square.
You need to adjust your rest to achieve "centershot" but this can only be done by you. You can get close by eye, then closer by walk back tuning, and finish by broadhead tuning.