The first 4 disciples
These 4 men worked on the lake called Galilee. They had their own boats. They caught fish on the lake. That was their work. It was a family business. In other words, their families had done this work for a long time.
Then Jesus came. He told the men that God had other work for them. They must leave their work, their boats and their families. The men had worked with fish. But soon, the men would work with people. Jesus would teach the men. They became his