Just as another anecdote, with the demise of bmibaby last year, (the failure of an airline is not an unfamiliar story these days), experienced pilots in the LHS, with 10000+ hours, aged 50+, are now back in the RHS doing the job you aspire to do aged 19(?) having finished your ATPL training.
That is career progression for you in this industry.
So plan for a possible 30 years climbing the ladder only to find yourself back at the bottom of it again at least once when you calculate the NPV of your future earnings to see if it justifies your chosen career path.