I think the idea you stop learning/can no longer learn past a certain age is rather stupid.
I think its a misconstrued fact, but the brain is always learning, I think the actual fact is its easiest to learn as a younger child, but I'd argue that is just due to not having knowledge already and not having any habits etc.
If you want to learn programming go for it! There's lots of very good resources online.
A language like python is very flexible and syntax wise is made to read close to natural language/English :)
Sorry I didn't read the post - Julia is quite similar to python also re difficulty