Fantastic! Well done and good luck on your journey. You're never too old to learn something new. If you have the means to do what interests you - go for it!
If it doesn't work out for whatever reason you can always go back to your old job or old life. But if you do, you'll go back a different person and you'll know more. Anyway that won't happen.
I look forward to seeing how you get on.
RE: Ask not what you can do for the world, but what you can do for yourself without getting distracted by the world.