I am 41 years old and I am looking at going back to school to pursue an engineering degree in either Petroleum or Mechanical Engineering. I already have a B.S. in Theology and credits toward a minor in Business Marketing. I don't have much of a science background at all. I am also working full time as a teacher. I would need to go to school and work full time as well. What advice would anyone give to someone like myself who wants to change industries and careers at such a late stage of the game?