Sorry if I confused you about locking the wrists. Of course you lock your wrists after the sights are aligned with the eye and then get on target by moving your upper body. I have a tape of Susan Nattrass doing her thing at trap. She locks her face,arms and shoulders to the gun and breaks a hard left by pivoting her lower body.
Ribbonstone's last post is correct. My right shoulder is too far gone most times to shoot one handed. When I do, my right arm is almost straight out sideways and I put my left hand in my back pocket.
Usually I use the isosceles position with my elbows slightly relaxed. You may prefer the Weaver stance, with the right arm pushing and the left arms pulling, assuming you're right handed. If I use the Weaver, I only bend my left elbow slightly. I've seen some pictures lately of shooters with their left elbow bent about 90° and aiming cross body, so that the barrel to shoulder angle is about the same as a rifle shooter's. That doesn't work for me.
It's so long since I shot regulation slow, timed and rapid strings that you'd wonder if I was bragging or complaining. No doubt the thinking has changed, but IIRC, the idea back then was that you had to clean timed to win in the Masters rank. Now I'm happy to break 80 at slow fire.
You're getting there. Keep practising and thinking.