first of all get the draw length and the poundage set, u dont want to try and pull a ton and it sounds like u maybe doing that after 20 times.Remeber it doesnt have to be blazing fast to kill deer.have it to where u can draw it back easily and where u can draw it back sitting. then u can go from there.You can also hurt yourself your draw length being too long.Get all this checked out and then after that u can begin tweeking the sights and the arrow rest depending on what you get.As for sight and rest recommendations.Go simple first,I would go with like a copper john dead nuts sight and a whisker biskit.I know people are going to start over the whisker biskit but its a fool proof rest and it does the job well