[sigmaprimus]

You have plenty of time, almost 40 is not even close to retirement age, if You retire at 65 thats over 25 years still (Amazon isn't even 25 years old, Facebook and Youtube are even younger.)"*edit Amzn is 26*"

Almost every post secondary institution is currently offering online degrees thanks to the Rona, so IMHO there has never been a better time to go back to school for mature students.

Learn the material, get certified, develop a portfolio and sieze the opportunity.

If you have your heart set on working in a FAANG type company and are worried about ageism, research the methods women and minorities use when submitting an application or resume to get an interview. I am certain the same techniques can combat ageism too.