Have a partner lie down and place your fist on him or her. Relax your arm and fist so you rest your fist on your partner from the shoulder and match his breath so you breath as one. Allow the fist to change alignment from the shoulder and elbow with his breath and slowly sink as the movement permits without pressing. Feel where there is no density and avoid pushing and tensing yourself. You will need to find your patience for this drill. Later on use this in movement and in the work to allow the strike to come in rather than pressing.
Feel what you have at hand rather than try to mold without feeling.