Hi, I'm not a teen, but an older woman. I just came into this forum to see what's there.
As far as makeup goes, and I've been using it for a very long time, I tend to go for the "cool" tones, mainly the lightest. Many of the makeups today are coded for warm, cool, or neutral. Makeup tends to want to turn orange on me, so I stick with cool tones. Blue's ok depending on the shade, like a blue grey or something like that.
As for foundation, I use L'oreal true match, and I use C1 (c for cool) and I'll use powder of C1 and then blush of either a C or N (neutral).
I don't usually use too much on my eyes, because of allergies. I'll end up crying all day.
OK, hope that is helpful.
Julie