You can become a programmer these days simply by picking up a computer and writing a few programs. Sure you won’t be getting paid, but you’ll be programming.
When I was a kid, I wrote BASIC programs on whatever hardware I could find. Scientific calculators, TRS-80s, Apple IIes. 20 years later, I finally made it a career.
At least one answer says that the actual programming isn’t the hardest part. I heartily disagree. If programming wasn’t hard everybody would be doing it. Getting good at programming can really be a life goal, it’s that hard. You have to start early, and keep growing to get good at it enough to have a career with it and make the big bucks.
Start coding. Keep coding. Never stop coding. If you can do that then everything else works itself out.