I have had light J frames. I dislike them, and find them worse to shoot with most ammo than my 296. They are also harder to shoot well than any other platform due to ergonomics. The only ammo I would seriously consider using in a light (or most any other) J frame is a good quality hard cast target wadcutter, or maybe standard velocity 158 grain SWC. What you want is a flat front and decent penetration.
FOR ME, even when unpleasant to shoot due to the ammo and configuration combination, I prefer a good quality small auto-pistol for deep concealment in circumstances in which appearing conspicuously unarmed is of value. I have a Glock 33 in a Kramer pocket holster that works well in both dress clothes and cargo pants. It is not even close to fun to shoot, but better than a light J. I put XS Big Dot sights on it, and I have qualified with it out to the 25.
My new Shield w/RDS is likely to be the new belt gun once tested, due to my vision. With a good holster (Dale Fricke) and belt, I should be good to go in most circumstances.