On the presumption that you are Right Handed
First, your stance.
Stand with your feet shoulder width apart. Presuming you are RH, place your RH foot back with the toe about even with your LH heel. Stand like a boxer would. Knees unlocked, lean slightly forward like you are pushing against something. Got it?
Now your grip.
Hand high on the gun, try to crush the grip. Wrap your support hand over your grip hand so that your fingers lay on top of the others. I won't bother with Weaver, Chapman or Isocoles, just hold your arms extended but comfortable. Now, put your head down so that your cheek comes close to or touches your right shoulder . Hunker or "vulture" down behind the gun. Sight up your arm. Got it?
Now get your sight picture.
Top of the front sight should be level with the top of the rear sight, front sight should be centered in rear sight. Target should perch on top of the front sight like a golf ball on a tee. Now, above all & most critical, FOCUS ON THE FRONT SIGHT THe front sight should be clear, the rear sight & target blurry. Keep your front sight in focus and resist the urge to look at the target to see your hits. Got it? Now close your eyes, count to 3 then open them. Are you still on target? If not, move your body left ot right untill you are centered on target after closing & opening your eyes a few times. THis is your natureal point of aim.
Trigger control
Now, slowly squeeze the trigger while watching the front sight to see that it stays steady. Stay focused on the front sight dammit!! Pretend you are squeezing a single drop of water out of an eye dropper. The discharge should be a surprise. Get the front sight back in focus, on the target and repeat.
Work at it. If you want to try an experiment. Do everything I say but close your eyes before your squeeze the trigger each time. Do that for 10 rounds and see how it looks.
Go over in your head as you shoot, stance, high hand, crush grip, front sight, smooth squeeze.
Report Back, let me know how it goes.
HTH