Used S&W model 10 or 15 in 4"
I recommend either of these 4" barrel, K-frame, 6-shot .38 special DA revolvers.
Reasons:
**They are absolutely, indisputably excellent handguns without peer.
**Because they are "only" .38 special, and not .357 magnum guns, they are available for anywhere in the $200s, rather than upwards of $300.
**Since you said self defense and target practice, you will be harming your hands, wrists, ears, and pocketbook if you shoot .357 magnum.
**Folks will tell you you can shoot .38 specials for practice in your .357 revolver, but there are yards of ink and bytes written on the subject of cleaning out the crud in the front of .357 cylinders from firing .38 specials. I would recommend you don't go for the "Swiss Army knife" solution.
**The .38 special isn't a weinie for self-defense either.
**Remember, target shooting will be what you use this gun for. I doubt many people, other than professional law enforcement agents, get into any self defense shooting more than once in their lives -- think about it!