I don’t doubt you have a compelling narrative.
But, fundamentally, many MBA schools want students who have worked in career oriented jobs for several years so that they can share relevant experiences that benefit classroom discussion, and from which one’s peers can learn.
Your potential admission to MBA schools will depend on you demonstrating that you have valuable insights and experiences to draw from and that other students will accept you as a peer…that may be a difficult sell at 19, but again I don’t know your whole story.