Welcome to the forum and to the wonderful world of air guns. You'll find lots of us ex-pistol shooters about.
As Simon suggests, visit the local club and see what others are using. Then see what type of shooting you like the look of, as all clubs in SWEFTA have zero ranges, FT and HFT courses, plus, as has been said, there is always kit being sold at good prices, with the advantage to trying before you buy.
The SWEFTA web site will give you club contacts, and shoot dates if your into competitions.
Take a look at: http://www.swefta.org.uk/