Welcome to Basenotes!
I'm 17 too and go to an all-boys school (though co-ed for 16-18yo). I use to have Red Delicious but it just wasn't for me. It was really quite synthetic and had a weird boozy-apple accord which I didn't like. I gave it away to a friend in the end. However, the scent might be what you want, so go for it if you like.
Lolita Lempicka is a good choice for a sweet-ish fragrance. I have it myself (though I don't wear it very often) and I love the anise/liquorice notes in it. I think you should try Terre d'Hermes (widely available). It's a citrus-woody fragrance and a lot of BNers love it too.