Well any bow shop should beable to get your draw length right or at least close. All bows are not the draw length shown on the bow either. You should rest the bow more on your thumb pad. Seriously, too long a draw length is the number one problem with people buying a bow. It's also the root of most inconsistancy in shooting.You can't anchor and pull through the shot with your back muscles. Your finger should curl around the release at about the first knuckle and take up the slack on the trigger. Then your back makes the shot go off and not you punching. Don't feel bad.... you and about 1/2 the other bowhunters in the world have the same problem. Proper stance can't be achieved if your draw is too long. Ideally you'd be facing the target more with your feet and not have them one directly behind the other. 45 degree or there about is good.

Davids right on the money with his comments in my opinion as were a number of others.The book core archery I believe is written by Larry Wise,Bernie Pellerite has written a great book called idiot proof archery,it will take you through all the elements of shooting step by step.Do an internet search for Bob ragsdale or Vic Wunderlie you should find a lot of articles about proper shot execution from two very good coaches.