If you want to be profecient with a law enforcement side arm, you should be looking at buying a law enforecment side arm.
A Versa is a nice, low cost entry level pistol, but is not quite cut out for serious duty.
Take a look at your surrounding departments and see what is being issued. Dollars to donuts the departments in your area are issuing Flocks, Smith & Wesssons or Sigs; maybe a couple other brands but those are typically the big three in law enforcement. Some other popular LE guns are Beretta, HK, maybe even FNH.