From time to time you read about shifting your weight during the forward swing.
Stand up with your feet the same distance apart as in your stance. Now turn to your right, keeping your feet in the same place, and “shake hands” with someone standing at your right side, using your left hand. Your can lift your left foot so only the toe stays on the ground.
Now turn to the left and do the same thing with your right hand.
Did you notice that the first time your weight moved to your right foot and the second time your weight moved to your left foot, and that you didn’t deliberately shift your weight, but it just happened?
That’s all you need to know about weight shift.