Ask HN: Is it possible to start of as a programmer at almost 40?

I am almost 40. I have been programming as a hobby so far because I could never get a job as a programmer. I am ok with Java and now learning Go which I totally love now and some JS. Is it possible to start of as a professional programmer at almost 40 ?

Update: Thanks everyone for your honest and insightful feedback. It helped me truly to stay upbeat about starting as a programmer at 40.