That is simple. Ruger GP100. .357 magnum. Built like a tank. Accurate, and less expensive than the SW with just as high quality. Stay away from off brands like Rossi and Taurus. You will only regret it in the future. A GP100 will never go out off time. it will never break. in fact it can probably handle higher pressure loads than any other DA revolver. Sight are adjustable, and the front sight post can be changed with only using a q tip. Push in plunger, change sight, release plunger. others may have differing opinions, but for a first revolver it is hard to go wrong with a 4-6" Gp100.
it is correct that a .357 magnum revolver can fire 38 spl shells up to +p+.
Note however, that the opposite is not true. a 38 special revolver cannot fire .357 magnum rds.
I also do agree that for a first revolver you are probably better suited to choosing a revolver that is in current production. If you wish to add others later than join the rest of us.