I'd fly with a 21 year old pilot, but not one who manages to make being almost 19 now, but presumes he will be 21 in a years time!
I presume you mean you haven't started your flight training yet, rather than you haven't started your education yet!
But seriously though, the earlier you start, the earlier you develop your experience and the earlier you should be able to make it into the better job opportunities.
Good Luck!