Portfolio? Are you applying to art school or AP Studio? If its the latter you are starting super early! Btw sorry for being a creeper.
I'm applying to an art school. Don't even know what an AP Studio is, uuh.Haha, don't worry, everyone's a bit creepy (and you're not, btw)
AP Studio Art is a course offered by college board to give AP credit to art students. You're lucky you know what school you want to apply to... I had a tough time deciding where I wanted to go.