Well, it looks like the OP got some clarity on his original question, but since the issue of SA vs DA got raised, I'll offer this: If this is a SD revolver (and since it's a j-frame, I'm guessing it is), learn to shoot it double action.
For one thing, as mentioned, SA is slow, and the video g.willikers just posted doesn't do anything to change my mind about that. The lady in the video, presumably very proficient with a SA revolver, gets off 1 round in about the time it takes to get several DA hits. Yeah, I know good Cowboy Action shooters go quite a bit faster, but they are highly skilled and generally shoot low-powered loads from tuned guns. The average Joe shooting defense loads from a J-frame ain't the same thing and doesn't compare.
Secondly, with no external safety and a light SA trigger pull, cocking the hammer in a high-stress situation is seriously risking a negligent discharge. Very bad mojo. Remember, you're responsible for every round that leaves that gun. An errant round that hits at the wrong time or place isn't excusable just because you were in a defense situation. At best, it'll just put a hole where you didn't intend. At worst, someone you love dies and/or you're now in legal perdition.
In a stressful situation, you'll do what you've trained yourself to do. If you mostly shoot SA at the range, that's what you'll likely do in a high-stress situation. If your primary interest is self-defense, DA must become a habit to the point that it's automatic.