Never Too Late
Go for it. A bit of maturity doesn't hurt in this job.
Started instructing when I was 48, and that was 18 years ago. Best change that I ever made in flying.
If my medical holds up, and I can still find the airport.....I'll be still there in 10 years, 20 years (?).....who knows?
The satisfaction you'll gain from this very individual, personally challenging and different career will outweigh most of the negatives.
happy days,