Wait until you feel a tug on the line. A big fish will swim up and gently grab the bait. Don't snap the line to set the hook. You will most likely come up empty. Carefully, release the bailer on the reel and let the line free.
Fish are like people.
Fish are the same way. It will gently grab the worm and start to swim off. He'll swim until he finds safe haven and then swallow the worm. Sound travels down the line like a Tin Can Telephone. The fish can hear you.