Since you are so young, you can get away with sheer washes of color!
For your haircolor and age, perhaps look at getting 'basics' that you would use a lot like Shroom e/s, and Mystery e/s (a good highlighter and liner, respectively). For fun, Seedy Pearl e/s is a good 'wash' for eyes when you are in a hurry (Shroom also works).
For lips, Subculture l/l and Spice l/l are nice and naturally soft. You could pair them with l/g in clear, Prrr, C-Thru, and even Nico (the glitter is very age-appropriate for ya-- rock it!).
Instead of blush, a nice soft MSF in any color is good, as is MAC bronzer (just a light wash-- be light with the brush).
Perhaps stay in the 'Frost' and 'Glaze' MAC l/s... the more natural the better.
If you want to save your $$$ and experiment with more colors, Covergirl and Maybelline make good colors that don't have too much pigment so that you can try different colors without having to worry that they will be too dark.
Good luck and remember to have fun with different looks! Just don't 'overdo' a good thing with too much makeup at such a young age!