Saul of Tarsus (later St. Paul) is NOT an Apostle, or one of the twelve eye-witnesses chosen by Christ. After his epiphany on the road to Damascus, Paul became an evangelist for Christ to 1st Century Jews and Gentiles alike in the Near East.
Most of what we know of St. Paul is taken from his epistles, or letters, to early Christian communities, and the Acts.
I suppose you can call him a disciple or an evangelist. But technically, he is not an Apostle. He was not one of the Chosen and had no contact with with Our Lord during His earthly Ministry.
You are leaving quite a bit out of his story there huck.