Using a Net
One way to acquire bait is to cast a net. Various baitfish are easily caught with the use of a cast net. It may be tricky at first to find the throwing style that works for you. The object it to throw the net from where you are standing, and have it open up before it hits the water. Then, you want to let the net sink on to the fish. Finally, retrieve the net with the bait trapped inside. There may be regulations on netting based on your location so always check.