I might be able to help. I owned my own archery shop and taught 3 state champions. (I was two time Wisconsin state champion many years ago).

In any case you'll need a bow square to measure the distance from the rest to the nocking point. Start about 1/2" above center (higher is better).

You'll need a bale to shoot into and some freezer paper or newspaper hanging down 6' in front of the bale. The idea is to stand or kneel (so you are shooting squarely into the paper) also about 6' in front of the paper.

The goal is to get a round tear through the paper. The paper also shows which way the arrow is "kicking" if you are hitting the rest or the knocking point is not perfect. Sometimes you can't get rid of a left - right tear without moving the nocking point up.

When you get the nice hole through the paper all that is left is using proper shooting form (back muscles, relaxed hands and arms) and you're set. A bowsling (for relaxed hand) is a must.