I have revolvers and like them, but shoot them rarely, and not well with two and three inch barrels. However, snubbies are, like the R9, basically “get off of me” guns, not for target practice. Why not, you say? Well they are not intended for target use but can be used so if one develops the eye/hand/trigger control muscle memory for that task.
If, however, the handgun is intended for self-protection, the “Rule of Threes” takes effect, i.e. most civilian gun battles occur at three yards, three shots in three seconds, and are nearly always point and shoot rather than aimed. That being the case, I would recommend that, as do I, one practice at 3, 5 and 10 yards with man-size targets, point and shoot, ideally two center mass and one to the head un-aimed.
That begs the next question: If the pistol is for emergency protection and there is really no time to aim if one wishes to survive, what possible use is there for a laser? Literature and experts suggests that the time taken to acquire the laser dot is likely to be all the time you have left. There may be an argument for home protection at night, but a Taurus Judge may be a better choice, particularly if penetration into a nearby structure is possible and frangible ammo is not used.