A sling shot, one of the wrist rocket types. I rigged one up with a string loop so I can attach my release to it. It helps a little with muscles and lets you get used to your anchor point and trigger release teqnique. Other than that just shoot the bow. Start at a lower poundage and work your way up. It takes a while to get the muscles built up, take your time and don't over do it. You will get there eventually.

I will probably work on your other questions tonight if no one beats me to it.

Paul