There's no too old or too young to make anythings.
You could liked to code in 97 years old and you can also liked to code in 3 years too. Then everythings depend on you . And even your brain doesn't allow much things to memorize you can still learn by hard learning.😇
Many baby-boomers are retraining themselves to meet the Future of Technology. We have our Masters and P.h.D. on the wall but with the Serge in Technology requirements in the work place many of us have to become certified in basic computer language's.
You are never too old. And programming can be a chance for you, because if your ability to remember lots of details decreases, special software like a knowledge management system can support you to hold things together. I am 49 years old and I have no formal education in the field of computer science. These days I am learning Python with the focus on SQLite database and Tkinter as a GUI to help the grey cells in my brain remember things or recognizing contexts.