I first got into weight lifting while watching a Star Craft 2 match, one of the teams was shown in a pre-roll going to the gym and lifting weights together.
I realized that instead of spending 3 hours a night watching SC2 matches, I could go to the gym for an hour, and then spend 2 hours a night watching SC2 matches, and end up looking good while doing it!
That path lead me to a job with Microsoft Health, to years of learning martial arts, and to learning all about health and dieting.
Healthy body healthy mind, exercise doesn't take much time, and you'll feel great doing it. It grows neurons (or at very least slows down their decay), and helps prevent life long issues that can come with the weakening of muscles that happens when sitting all day.