Low and left is common, I did that at first with my GLOCK, but lots of practice helped that.
I assume that you are right-handed.
Somethings to try:
A very high, firm grip with right hand. If you are gripping tightly already it is less likely that your other fingers will squeeze along with your trigger finger and move the gun (milking). Try pointing your thumb tip down to get a stronger grip. We can't all be blessed with the coordination and fine muscle control of the elite shooters so their particular thumbs forward grip might not work for us.
You absolutely must focus on the front sight, even at the expense of the target blurring. If you are not strongly dominant in your dominant eye, you may have to close your other eye. Both eyes open is best for tactical shooting, but lots of Bullseye shooters wear a blinder. You must be focused on the front sight all the way through so you can call your shot. Do not try to see where your shots are hitting the target until you're finished shooting and have lowered your pistol. Call your shots, you should be able to say "that's right on" or "I pulled that one".
When you squeeze the trigger you must pull it straight back, experiment with trigger finger position, generally if your joint is touching the trigger you have enough strength to have good control. Don't try to predict the pistol firing. Don't hold on the target for more than a couple seconds without firing. When you are "in the neighborhood" begin squeezing the trigger while maintaining your hold on the target and it should be a surprise when it fires.
Dry fire every day for at least a few minutes - after dropping the mag and clearing the chamber and getting the mag and ammo out of the room - of course. If you set the gun down check it again before you do more dry firing. You can skip dry firing if you actually go shooting of course.