Meet Jonathan Garcia and just try to come up with any impression but that of an average youth.

At 18, he’s approaching his high school graduation. He’s making friends and cheering for his Southwest Miami Senior High School Eagles.

But then how many teens nickname themselves ”Obscene” and perform music for national audiences? In South Florida, at least, the answer’s only one.

Garcia, who spins vinyl records under the name DJ Obscene, has literally made a job out of DJing since he was 15.

And recently he reached the first pinnacle of his career — if that’s even possible for someone barely old enough to vote — when he performed for two hours on Shade45, the Sirius Satellite Radio channel belonging to Detroit rapper Eminem, aka Slim Shady.

Garcia landed the gig for the Rep Your Set mix show after a mentor, Miami’s DJ Ideal, introduced him to segment producers for Shade45, who decided the kid was talented enough to perform on air.

Rep Your Set presents DJs from different parts of the country and ”helps us to keep regional flavors alive,” said Paul Rosenberg, the show’s creator and Eminem’s manager.

For his part, Garcia was just giddy for the chance to offer a mix of Miami rappers to people all over the country.

‘I started off the mix with the biggest song coming out of Miami right now, Rick Ross’ Hustlin’. Then I did a couple of songs off Smitty’s album Lil’ Haiti,” he said.

Garcia also paid homage to Miami rapper Pitbull, and gave play to You Ain’t from these Parts, a song by rapper Lunch Money.

Ron ”Mills” Triani, producer for Rep Your Set, described Garcia as “one of my go-to DJs in the Florida region . . . I’m glad I got to be a part of bringing to light this young man’s talent to millions.”

So how does a kid from the south side of Miami land such a big gig?

”Well, I’ve been DJing about four years now, but I’ve wanted to since I was a little kid, because I just wasn’t into the other kid stuff — toys, games, whatever,” Garcia said. “Basically, I was always into music and wanted to do stuff with music. I used to make tapes of hot songs.”

Garcia got so good at compiling mix tapes, friends said, that by fifth grade he was selling them in school for profit. ”That is true,” he laughed. “I was trying to make that paper.”

By the end of middle school, Garcia, who had received a turntable set for a holiday gift, began getting invitations to DJ classmates’ parties.

A brainstorming session with friends led to the DJ name ”Obscene” by way of Eminem’s song Without Me, in which the Detroit rapper says “It’s just me, I’m just obscene.”

As DJ Obscene, Garcia’s sets at parties began to cause a buzz on the local hip-hop scene. And by the time he was in 10th grade, the man who would ultimately become his mentor, DJ Ideal, helped Garcia land an internship at 99 JAMZ, WEDR-FM.

That gig led to more party bookings and even a stint of nightclub performances at venues including Señor Frog’s, Club Red, Bamboo and Life.

”It only came up once or twice,” Garcia said slyly of his age. “People just assumed I was older than I was since I was there to work.”

Garcia has moved on from 99 JAMZ to Power 96 WPOW-FM, where he regularly fills in as a DJ on afternoon and evening shifts, and the folks at Shade45 said he’s always welcome on their air.

But next up for the teen?

”I’m just trying to finish up high school like a regular teenager,” he said. ”I’m focusing on my studies more,” and maintaining a 3.5 grade point average. “And I’m even doing stuff like getting to know people in school. And that’s something I really hadn’t had time for the past few years, because I was always working, DJing somewhere.”

One thing Garcia has time for now that he didn’t in the past is girls.

”I do have a girlfriend now,” he said with a laugh.

And she must be pretty understanding.

At their upcoming senior prom, Garcia already has been tapped to spend 30 minutes or so on the turntables.

”It’s what I do,” he said.