Planner
Age should never be a barrier to achieving your goals.
From the age of 12 it had been my ambition to qualify as a pilot. However for medical reasons this never proved possible. Earlier this year (after many attempts) I finally resolved my medical difficulties, got a class 2 medical and have embarked on a PPL ...at the grand old age of 61. Ok, I recognise that I may never actually make a living from aviation but I'm having a hell of a lot of fun in C172, and may even get to be an instructor...who knows.
You can have a great career outside aviation (I did) but life is short and time moves with frightening speed. If flying is your dream go for it. At age 40 you are truely still a kid !!