Zantrin...
Nobody mastered the DA revolver in one or two range sessions. You'd probably need to shoot each of them quite a bit to-
a) get accustomed to the individual grip/trigger engagement dynamics well enough to actually shoot it well, and
b) begin to learn the gun's individual DA stroke well enough to shoot it well
I taught the DA revolver for awhile (still do occasionally) and unless you have really small hands, you can usually find a grip that'll work. The new N-frame S&W's are now being made with an adaptation of the old "K" round butt; this grip is downright tiny with service-size "magna" stocks installed.
I'm betting that if you tried a .44/.45 S&W "Mountain Gun", stocked as noted above and fitted with a Tyler "T-grip", you'd be pretty happy. Another good alternative is the old Pachmayer "Compac" grip, and Butler Creek's adaptation of the Spegel "boot grip" is worth a look.
One thing is for sure- if you're going to master it, you need to shoot it to the exclusion of everything else. The best shooters master a particular gun instead of taking a suitcase full of them to the range every trip- and not shooting ANY of them particularly well. Go to any public range on a weekend, and you'll see what I'm talking about. There'll be 2-3 guys on a station with as many different guns, and they'll have a rotation going. Two will be loading mags and one will be stepping up and blasting ten rounds as fast as they can shoot- repeat until ammo depleted. If they're 15-25 yards, their targets will look like they emptied a riot gun loaded with 00 buck, in the general direction of the target frames. These guys keep the ammo companies in business and they're having a blast- but they could shoot like this for decades and never improve their skill. Mastering the gun is more fun in the long run, anyhow.
Start with light loads, shoot lots of D/A from 7 yards to start, and then work your way back slowly until you're getting good hits at 20-25 yards. It is entirely possible to keep 5 of 6 shots on a playing card at 20 yards, shooting double-action. (We used to try it at 50) Strive for this kind of accuracy and don't accept anything less from yourself. Make it your goal.
If you want to learn to shoot a big D/A bad enough- you will. All you need is decent or correctable vision, good hand-eye coordination, and raw determination.
Well, a reloading outfit might help, too
Take care-