Lots of great advice /\
Since the OP said his revolver will be for target shooting, not for CCW or hunting or self defense (since we can't defend ourselves with a firearm anyway

d

), we have the same need.
Can't have enough revolvers and you can start with any S&W or Ruger, 357, 44, 22lr whatever. Doesn't matter as it will only be the first of many.
All I can say is my first revolver was a 686-3 back in the late 80s, actually I bought a second one within days of the first. I've had around 20+ different Smiths and Rugers and a Colt, pass through my hands. Not many in comparison to others in this forum.
Mulitple 586s (2) and 686s (5), and GP100s (2), Smith J, K.L.N frames in blue and stainless, Ruger Security 6, 357 Blackhawk and even a Colt Python, among the mix.
Have decided to keep only three, a Smith 686-3 practically new when i got it, 3K+ rounds by now, a GP100 new from Reliable Gun with 2K+, and an Alfa Project 9mm unfluted bought 100 rds old and another 100 by me.
Eventually I wll give two to my son and grandson, keep only the 686-3 for myself. I will have gone complete circle.
Guess what I'm trying to say is, for me, the best all around revolver is the LFrame 686, pre-lock. I think the -3 is the best of the breed. 38 special/357 magnum is the best all around caliber and if you cast and reload, cost is close to .22lr ammo. JMHO, YMMV