I like to start with the simple. Like gibblet said check for contact. I use a spray foot powder and spray it on the rest and shelf.

Make sure your arrows are balanced and the correct spine.

I personally have a hard time tuning with an over draw. They are funny.

Shoot through paper at different distances to see what the arrow is doing.

An arrow equipped with a broadhead will say a lot. With a high tear I would expect the arrow to dive well below a field point hit.

Hang around. You'll pick up some good info. I have.