You are plenty young enough, but assuming you are not a pilot already, there are a LOT of things you will need to learn about and consider before you make that decision. Read some of the recent threads on this forum to get a idea of where to start. Many of the big-time "glossy-brochure" flight schools charge 2-3 times what you really need to pay to get your training.

Also, my first suggestion would be get a private pilot's license on the side while you keep your real job. Find out if you really enjoy flying...if you don't like it in a C-172, you probably won't like it in an airliner either.