I know of several gentlemen hired at the airline where I'm training who were over 40 with times under 1000 hours. I wouldn't worry about your age. It seems airlines are interested in getting a mixed group of people with different experiences, skills, and abilities. Being older just makes you a slightly different candidate which could even make you more attractive to them. Apply when you feel ready and meet the minimum requirements (those two things may not come at the same time).

You should pursue whatever you want to...whether that's flying airliners or doing anything else. Just make sure you research regional airlines or anywhere you might want to work to make sure it's the right move for you. Best of luck!!!