If you're just looking to shoot shit.
Go to walmart, buy an airgun. They all go pew.
Airsoft isn't accurate, especially the cheap ass shit you're looking at right now. Like the guy mentioned above. You're looking to spend a lot of money to just get the thing shooting straight and far.
Crosman makes decent airguns that are sub 500fps. I own a Phantom 500 from them. Shoots fine.