Thanks for asking our advice.
Ditto on the dry firing. Also the 22 rimfire. No one has mentioned a shooting glove. The padded, reinforced palm makes a big difference.
When shooting single action (bullseye style) every drop of the hammer should be a complete surprise to you.
hold the gun with both hands on the grip
cock the hammer with a thumb, either one,
line up the sights with the target
put your trigger finger in the trigger guard and lay it lightly on the trigger
observe your breathing
keep the sights aligned
observe your breathing - as you start to exhale put a little more pressure on the trigger
keep the sights aligned
observe your breathing
if the sights are still aligned, put more pressure on the trigger
repeat, slowly until the trigger "breaks" and it is a surprise
When the Marines have a trainee who has developed a flinch, one technique for demonstrating that the trainee and the rifle ARE capable of accuracy is this:
Have the trainee aim the rifle only, but the trainer has control of the trigger. Invariably, the group size is far superior to those produced by the trainee alone. Imagine that scenario when you are shooting.
Congratulations on a fine gun. If I had not just gotten one, I would offer to give you a fair price for this one. I have always wanted to mount a scope on my Redhawk, but the Super Redhawk has scallops on the frame for mounting a telescopic sight, but they put the scope too close to the hammer. The Hunter model of the Redhawk (and the Hunter model Blackhawk, too) have the scallops on the top rib of the barrel, putting it further forward and out of the way, so my thumb can easily reach the hammer.
Do get a 22 rimfire (with decent sights and accuracy - many are not accurate) or a target grade air pistol for practice.
Do get a shooting glove (will help as much as the new grips).
Do practice dry firing (especially if you don't have the 22 or air pistol).
Good luck
Lost Sheep