Now for a little difference of opinion. I use the first joint of my trigger finger and teach students to do it that way. I have seen other folks also advocate that. You have much more strength and control using the joint on the trigger in double action shooting. Jerry Miculak uses the pad, but he is very strong and has been doing it forever. Use a straight through smooth, stroke, front to back, without stopping and starting, not too show and not too fast. A lot of new shooters will find their sight picture, then slam the shot double action. Rather, refine the sight picture while pulling the trigger. Not separate steps, but rather one process. Follow through is very important. Do not anticipate the shot. Have fun. When you are dry firing, make sure that the sight picture is undisturbed all the way through the stroke of the trigger. Good luck. It really helps to have someone that know what they are doing watch your trigger pull.