Adapting revolvers is much more problematic than autopistols.
To start, I use S&W revolvers exclusively for defensive use. I do have several single action revolvers but they are mostly for 'fun' which includes cowboy shooting back when I did such things. I do have three Colt revolvers, all in my 'police revolvers' collection. I have shot them, but not seriously.
To clarify my first statement, I use 'older' S&W revolvers with pinned barrels and quality workman. So the 'slicking the trigger' is much simpler. My style of double action shooting depends more on a smooth trigger pull than simply a lighter pull with varying pull levels in the cycle. Ruger 'six series' (back in the old days) were a solid second action. Worth the work.
Grips have much mention. People have different hands, different sizes, different shapes, different tastes and - especially - different shooting styles or techniques. I have more or less 'average' size hands, (have all my digits) and have a tendency to a rather high grip to put the axis of the bore as low in my hand as possible. The important part is to have the grips fit the hand as the shooter requires. I prefer the Herrett Shooting Star line. The rubberized grips do cushion the recoil, but I find they are uncomfortable in the main, being 'too sticky'. Not as bad as service or magna grips from the factory, but not as good as Shooting Stars.
Sights. With S&W revolvers, even the fixed sight models have ample sights. Some need adjustment which can be accomplished with a small (swiss) file. Nearly all fixed sights shoot well to the point of aim. The adjustable sights are delightful and I have never needed to replace them - except for one that was left in a damp climate and the sight was rusted solid internally. I put a replacement S&W sight on it and all was well. By the way, no sights will cure a constant flinch.
In general, I prefer shorter barrels, but I also prefer a full extractor throw. The two inch barrels are more convenient to hide, but a pain in the yarmoosh to eject empties. Of course, by hitting with the first couple shots, reloading isn't as important.