I'm just a young teen looking for a website where I can download my mugshot for free. I need it for a life project of mines.

You're a "young" teen with a mugshot? For what reason do you need a copy of it?

Mugshots are not available online. The only "mugshots" you might find would be the ones from convicted sexual predators. If you want a copy of your mugshot you could go to the police station you were arrested at and ask them for a souvenir copy preferably not autographed for your project.