I was a weapons instructor for 8 years. In our classes, usually it's easier to have people start shooting with only their dominant eye open, the other closed. Once they master the fundamentals of shooting, they can move on to other challenges, and more complex exercises. If you're just wanting to know about shooting on a range, I would try that first. Once you have more experience, and want to move on to shooting courses, you can start practicing with both eyes open. It will take some practice, but get with people who know what they are doing, not just "barracks instructors". As far as distances, the AF has you fire at 7, 15, and 25 meters. If you want to know anything else, please feel free to e-mail me!! Whoever said 300 meters.... for a pistol??? I gotta see that one!!
Technical Sergeant, USAF, deployed OIF