There, fixed it for you. NOWHERE in the Greek is the word "began" included. His desciples had already left their livelihoods to follow Him. If words have to be added to scripture to support a belief it's not scripture.
John 2:11)
11 This beginning of miracles did Jesus in Cana of Galilee, and manifested forth his glory; and his disciples believed on him.
His disciples already believed in him as they were following him, I would call this a clincher.