I know that there's a lot of advice coming at you but here's something to try; hold your bow arm out in front of you, without the bow, as if you were going to take a shot. Relax the muscles in your arm (you should only feel tension in your shoulder) and look at how it is bent. That is how your arm should look at full draw. Relax your grip hand so that it is only held by the pressure of the bow pushing into either your palm (low grip) or the web of your thumb and forefinger (high grip), and let the bow fall out of your hand when it is fired (get a bow sling!) The key is to get as much tension out of the system as possible. Oh! and get an armguard, you'll need it to keep your jacket out of the way when the weather cools down anyway.