What year did van Gogh start painting?

When he was 28. I say this is MFA myth,... and even at twenty seven would be considered false to me. Have any of you really had yourselves a good peek at any of his Juvenile works of art,.... and wasn't he about 14 years old when he went to work for his uncle Cent in all his Goupel Cie Galleries all over Europe? Wasn't those works he was selling prints of Rembrandt's and of the living artist Corot's works, along with a few of living artists original works of art?