If your feet are moving a lot at any point of your swing, then you are swinging too hard.
When taking your backswing, initiate it with your chest and make sure your hands are firm at the top before swinging. Practice a few half-backswings to loosen up before you actually hit the ball. At the top of your backswing, your dominant arm will be bent at the elbow and almost vertical. The non-dominant arm will be almost totally straight.
Try not to take big divots out of the turf under the ball. You want to sweep the ball off the turf on your downswing, rather than hitting into the turf below it.
When you finish your swing, your belt buckle or button of your pants will be facing the target. If it’s not then you need to focus on letting your hips lead on your next try.
When you turn your head to the left you will be looking right at the target.
During your swing, you want to be able to comfortably shift your weight to your back leg during the backswing, then forward again to your front leg as you swing through the ball.
Catching the ball on the downswing means hitting it before your club starts swinging up again. If you hit the ball on your upswing, you will achieve less distance and accuracy with your iron shots. Line up the ball with the logo on your golf shirt, if it has one, to help you hit the ball on the downswing.
Keep your arms relaxed, your back straight, and the belt buckle or the button of your pants facing straight forward in your beginning stance.
