Hey! I believe that there is no more difficult type of training than training your shooting. You will have to hone this skill for years to constantly hit the bull's-eye. Plus, you'll need a ton of bullets. Still, I can help you a little. I advise you to pay attention to this Firearms training
I have also honed my shooting with these drills and I am happy with the result. In a relatively short period of time, I learned to hit 8/10 bullets right on target!