It’s been a whirlwind of interviews since 15-year-old Brynn Cartelli was crowned the winner of NBC’s “The Voice.’’

“It’s really crazy and unreal,’’ the Longmeadow native said on the phone the other day.

And it doesn’t look like Cartelli’s schedule will slow down any time soon. The teen returned to Massachusetts Saturday and will soon finish her freshman year at Longmeadow High School. Oh, and she has an album to work on now that she’s won a recording contract — her prize as the youngest-ever champion of the reality singing competition.

Cartelli hasn’t wasted any time planning the new tracks with her “Voice’’ coach, Grammy winner Kelly Clarkson. In fact, Cartelli got a text message from Clarkson while we were on the phone.

“Kelly and I are talking about this right now,’’ Cartelli said. “We’re working on it already.’’

Cartelli and Clarkson became friends during the teenager’s time on season 14 of “The Voice.’’ On the show’s finale last week, Clarkson said she was “going to be Brynn’s big sis for life.’’ For her part, Cartelli said Clarkson is likable as a person and a performer.

“If everyone loves you for the person you are, let alone your music is incredible, I think that’s a really great place to be,’’ Cartelli said.

The biggest lesson Clarkson taught her, Cartelli said, is “to be real at all times, to remain yourself. It’s just really important that you don’t let any of this eat up who you are as a person. It’s so important to just be nice to everyone and be respectful.’’

Cartelli told us she’d sent Clarkson some ideas for her album, including a copy of English artist JP Cooper’s LP “Raised Under Grey Skies.’’

“It’s totally the vibe I’ve been going for,’’ she said.

Cartelli said she plans to write her own songs. Her first single, “Walk My Way,’’ which she performed on “The Voice,’’ was written by Julia Michaels, Justin Tranter, and Nick Monson, but Cartelli put her own mark on it.

“Julia’s version was amazing,’’ she said. “She sent us the demo, and I took that and made it my own.’’

Cartelli said “The Voice’’ helped her  realize the type of artist she wants to be.

“I want to do a darker, pop-soul kind of feel,’’ she said. “I want it to be current but have this old-school-funk kind of vibe to it.’’

She said she expects to begin writing songs soon. She’ll also need to finish her school work, which she has kept up with while in California by meeting with a teacher almost daily. Asked if she’ll attend Longmeadow High next year, Cartelli said she doesn’t know.

“I’m still trying to figure out what’s going to be best for me in the moment next year, what’s going to work out for the career, and being able to balance it all,’’ she said. “But I still want to graduate high school. I want to go to college, if I can. That’s really important to me, and I really hope that I get that opportunity to do so. But at the same time, music is in the forefront now, and I want to pursue that.’’

Cartelli has a lot to figure out. In the moment, though, she was looking forward to being at home.

“I miss all my friends,’’ she said. “I miss the weather. I love California weather, but I love spring in New England. I miss all the flowers blooming and everything.’’ (Kristi Palma, Boston.com)