I would say look into the contract details of how much money you are bonded for??? you are only 21 and if they offer you a decent wage as AME then you kill 2 birds with one stone....you become a Licensed guy and then get lots of certifying and actual signing experience. Just passing exams and studying in the college doesnt actually help much in the real world.......experience matters alongwith your aptitude. If the contract looks dodgy then let it go.....Dorniers arent something which will give you a step closer to anything else.....if it was something like any Boeings or Airbuses....then I would say do it blindly.......but end of the day its your choice mate......this is only the start of your decision making.....Good Luck!!!!