100% - there always seems to be something to learn or to brush up on… but maybe that’s not a bad thing as it keeps you mentally active (though it can be frustrating too!).
I highly recommend @chrispine’s book-learn-to-program-third-edition (it’s mentioned in the link I posted above too) - here’s what I said about it in another post. I often recommend that book to people and say you’ll know if you want to be a programmer after reading it! It’s such a motivational book and Chris says all the right things at the right times 
With regards to your ADHD, you might find some of the threads in the Health & Diet section interesting 
(the book I mention in this post may also be of interest to you).
PS, I edited the title of this thread for you to make it a little shorter… hope that’s ok! 