Nah, not necessarily. I'm 40 and meant to be doing prep study for the Cytech exam and I've watched a grand total of one tutorial video, but I've put in almost 100 hours on Euro Truck Sim 2.
That has nothing to do with age. Most people nowadays are so used to instant gratification that they struggle with stuff that only helps them in the long term, me included. Last time I tried to seriously sit down and learn I caught myself doing dishes and watering plants after not even 30mins.