Congrats on getting a gun.
Good advice about practice. Go slow, think and do it right each time you pull the trigger. Don't jerk the trigger just because your sights are on target. Many folks fault on this point, because they have a problem holding the gun sites on target and jerk the trigger when they see a line up. Think, breath, hold you breath, aim, squeeze slowly. Load a couple of dummy rounds. When one is chambered (you don't know when) and you pull the trigger, the gun should not move. If it does dip, you know you are doing it wrong. Get in a habit and your natural reflex will take over after a while. Speed will advance for you.
Good luck, have fun and enjoy.