How long have you held your CPL/IR? age 19, you can't of had it too long. I know people who waited 12-18 months for their first break, but it came in the end.
Personally, I went straight into instruction as I had planned that from the start, rather than blindly sending out 25 cvs, I turned up in person to 5 companies and found a job within 5 days.
I know things will be different trying to get straight into an airline, but turning up in person, dressed smartly with a good looking CV in your hand is far better than just sending off one side of A4 and hoping that makes the impression for you.