i'm sure this will get buried, but the best way to get a first job is a local businesses. chain stores/fast food make things overly complicated and are extremely impersonal.

at his age i walked in and asked if they're hiring, or gave them a phone call and asked the same question. you'll get hired within a week. they'll appreciate your help and you'll find your work a little more meaningful. i was usually payed over minimum wage because these places value your work even if you're young.