I tried once with a handgun on a rest. Didn't like it. I figure, when I'm shooting a handgun I'm either doing it for fun (it's more challenging than a rifle) or for self-defense practice. Neither case needs a rest, and both I do standing.
It'd be interesting to know that a gun does x inches at 10 yards, to know that anything over x inches is my fault; but w/o a vise to hold the gun I figure I'm getting just as much error in a rest.
My opinion only.
When starting out, either with a new gun, or as a new shooter, go for 3 yards first. Get on paper, then group decently. Then add distance. Easier that way. A new shooter will be encouraged by hitting paper properly. A new gun could be way off, and it'd be just wasting rounds until you figure it out.