I would put 4 F powder in the pan and tap the breach until the powder trickles in or alternately push it in in small amounts with a vent pick. If you have not 4F, go to 3F and once you feel you have some powder in the "chamber" ram the ball to the bottom, if it is not already there. Hold the barrel up and smack it with your hand a couple of times then horizontal and fire. Reason for holding the barrel up etc is that if the gun has a recessed breach plug, you want the powder to be close to the vent hole.
I have seen balls pulled with a screw on the end of the ramrod but I have also seen the end of the rod pulled off and even worse the rod broken several inches from the end, while trying to screw it into the ball. I do use a ball puller but it is a iron rod with a removeable brass tip that is 10 or 20 thousandths under bore diameter and a #12 wood screw silver soldered into it. That centers the screw and protects the bore from damage. The rod has a T handle and I tie a rope to my vice with a couple of feet of slack and yank with increasing amounts of force
cheers mooncoon