I strongly recommend a .22 revolver as a first gun. Ammunition is generally available and less expensive than centerfire fodder.
Next in line would be a Ruger 22 auto.
There are some police turn in Sig 225s out there at some of the wholesale outlets. You would arrange with you local retailer to order one (and take his fee).
I understand that they are nice single stack 9mm.
The Taurus 92 is also an under rated pistol. My brother has had one for 25 years and it has never so much as hiccuped. It has a steel frame (its parent Beretta has an aluminum frame).