From the moment you started focusing on the result (becoming a better programmer) and you forgot to enjoy the journey (why would you ask if you should go through the lectures of a recent Coursera course if that's something you enjoy doing?) you failed.
In my opinion, do what you enjoy doing, nothing else matters as long as you enjoy what you're doing.
In my opinion, do what you enjoy doing, nothing else matters as long as you enjoy what you're doing.