Just from my experience. Worked in another industry from 1989-2009 while just doing some single engine private flying for recreation. Then at 38yo I decided to fly for a living. First job Sept09, second job March11 (studying ATPL during these two jobs), third job (jet job) in April14. I'm really glad I made the change.
It's harder to learn when you're older.
You will go backwards financially for a few years.
No regrets now and glad I did it.
Always keep an open mind, work hard, be nice to others and never ever give up.
Best of luck, you're never too old.