I finished my CPL/IR in 1997 at age of 39, did 18 months instructing and then got a job flying Heavy turboprops for the last 18 months.
My company seems to favour applicants age 30+ with about 1000 hours.
I would like to fly jets and now have the same doubts as to whether i will - but it seems from posts i have received that anything is possible. I personally know an F/O who had an interview for a jet F/O position and he is 56 !! - you can fly as F/O until 65 they told him
Best Wishes