I've read that slightly squinting your non dominant eye helps
Once you determine which is the "dominant" eye, getting to "two eyed" shooting is most difficult.
It has taken me years to overcome a left dominant eye in a right handed shooting stance.
We automatically close one eye while trying to focus the other on the target.
Squinting at a target with one eye closed leads to eye fatigue.
Best to train your shooting eye to ignore the other eye.
Eventually, I learned to open both eyes with every shot.
Pull the sights off a BB gun. If you can, pull the sights off the hand gun.
Shoot cans till you stop missing. All ranges. Over time you'll develop instinctive shooting. Similar to shooting a shot gun.
After you get the 'feel'. Put the sights back on.
+1 for me. Thanksive always struggled with this as well thanks for all the info