There's a really great (free!) app called Couch to 5k (or C25K). Over the course of five weeks, three times a week, it trains you with the walk-run-walk method. You start out walking for one minute, jogging for 30 seconds, walking for one minute, etc. for a total of 30 minutes. The next day is walking for 1.5 minutes, jogging for 1 minute, walking 1.5 minutes, etc. until you're jogging for 30 minutes straight.
For me personally, music doesn't distract me enough for the 'hate hate hate' that runs through my mind while I run. I paid for an app called Run, Zombies! where you're a runner for your town gathering supplies and avoiding zombies. Yes, zombies chase you. I like listening to the story while I run. Plus, as a young person, putting anything in a game helps!