Firstley i think you have gone down the right road, want to try shooting, £50 is a good start. You here all the blaa blaa about how bad they are but you are having fun with it.
You may progress to a pcp or a co2. but for now you enjoy your gun, prob getting more use than some of the guys with £500 guns. Oh and better than shooting pennys, are strong mints, i get 4 packs for a pound at the pound shop, brill when they explode