Buy a cast net and throw it at the boat ramp. U can catch shad and sunfish fairly easy. Did that half my life until I got my first boat. You can go to the Asian market and buy skipjack tuna fresh and cut it up or fresh herring if you don't want to mess with a cast net. The key is FRESH, oily and stinky.
There is a fine line between fishing and floating around like an idiot!!