Before becoming a disciple of Jesus, what was Matthew's profession?

according to Bishop Spong, the four Gospels were not written by Matthew, Mark, Luke, and John, but we're done several decades after Jesus died by unknown authors. there were many other Gospels which were tossed out during the council of Nicea including a Gospel of Mary Magdalene.

Remembered this from Sunday School.

I suggest reading the series of books published by Bishop John Shelby Spong to gain a greater insight into both old and new testaments.