Firstly, you should pick a right handgun and ammunition based on your needs, prerequisites and your body features such as weight and height. Considering purchasing gears such as ear plugs and safety goggles to protect your ears and eyes.
Secondly, learn how to hold the handgun properly. At first, try to pick up your gun carefully and keep your finger away from the trigger guard. Once you totally control it, keep the barrel point downrange, not point at anyone whether your gun is loaded or not. For starters, it is highly recommended to practice with an unloaded gun.
Thirdly, get to know how to aim the gun accurately.
Close an eye and open the dominant one to make sure you align the front sight with the rear sight. If you can’t make your eye in that way, then open both eyes, but make sure you ignore what the side picture and focus on your target. At this point, you can adjust the gun to the target. When you get the right trajectory of the bullet, load your gun.
The last and most important step, fire the gun!
It is of vital importance to keep your breath consistent before firing the gun. Don’t let nervousness mess everything up, and take a deep breath to keep your attention. When you squeeze the trigger, the gun will immediately fire. If you have someone who is excel at the handgun, then try to practice with him or her. Have a chat with them about your problems and get some useful ideas.