Learning to Fish 2

Mark 1:19-20 says “When he had gone a little farther, he saw James son of Zebedee and his brother John in a boat, preparing their nets. Without delay he called them, and they left their father Zebedee in the boat with the hired men and followed him."
The second thing I noticed about learning to fish is that John and James "prepared their nets". John and James most likely learned the trade from their dad. I'm sure he taught them everything necessary to catch fish and earn their living. I'm not sure how nets are prepared. But, what if they were not prepared? Would they catch the fish they desired most? 
Will you catch the "fish" you desire most if you are not prepared?