If you want to become a good pistol shooter, bullseye shooting is very good marksmanship practice. Do not buy someone else's handgun unless it fits you really well, it is cheap, and if you know the history of it. Buy your own new, and go from there. Buy a .22 first and get good before you start spending money on larger calibers. You will never shoot the barrel out of a .22 and you can shoot a lot of rounds for next to nothing compared to the centerfire calibers. After you get use to shooting the .22 and get really good, you probably will not want to shoot the centerfire calibers. The .22's are more accurate, last forever, no recoil with a heavy barrel, and much easier on the ears.
You need to decide first what grip angle is most natural for you. I prefer the more slanted grip that the Ruger MKII's and older High Standards have. Many people prefer a military grip angle like the 1911 has because it is more comfortable for them, and also allows them to shoot other centerfire handguns they own without having to transition back and forth between two different grip angles.
As I stated earlier I only have experience with the slanted grip angles for bullseye shooting. If you like this grip angle then I would recommend buying a Ruger MKII Government Target Model. I shoot one with the 6-7/8 inch barrel in Stainless. They are the most accurate .22 handgun on the market and especially for the money. They can shoot just as accurately as the high priced competition handguns. Let the flaming begin.
There are a lot of different target grips available and the triggers are easy to lighten up. My trigger is around 1-1/2 pounds with a 1/2 inch wide shoe. I shoot only iron sights. The factory Ruger sights have a higher profile and will suffice. But if you like the line of sight lower and closer to the barrel there are a few aftermarket iron sights with a lower profile and of higher quality.
I also have a Hamden made High Standard Supermatic with a factory compensated 7 inch barrel. I had to make my own competition grips for it because I am left handed. It came from the factory with a beautiful trigger pull (just under 2 pounds). My Dad bought it brand new in the 1950's and it also came with a 4 inch barrel for $50. It is my baby.
Both pistols are tackdrivers. The Rugers are a bit of a pain in the ass to strip down, but once you learn how to do it you can do it quite quickly. I had a speed strip conversion put in mine. It is a threaded bolt stop that will unscrew out the top of the receiver with an allen key in a matter of seconds.
If you decide to shoot a .22 do not waste your money on the expensive match ammo. You will never be able to outshoot the accuracy of your handgun freehand, and you will most certainly not be able to tell an accuracy difference in match ammo shooting freehand.
Good Luck.