K²...I would think you would like Air Rifle shooting more then you might think. I would suggest you try a friends or buy a cheap $50.00 dollar one and try some pop-can shhoting, then advance to varmit shooting if you do well and like the former.
My choice if I were to buy a Air Rifle right now would be this bad boy from The Sprortsman's Guide: http://www.sportsmansguide.com/
RWS® Model 48 Air Rifle
Zips .177 cal. pellets at 1,100 F.P.S. or .22 cal. pellets at 900 F.P.S. Side cocking Measures 42" long overall, weighs 8 1/2 lbs.
They have many good models from as low as $59.00-$400.00
I dispatch the local Rats & Mice with a cheap GAMMO Air Rifle that only has about 570 lbs pressure and it does a real good job. It too is a single pump.