hey- i'm also a teenage girl, i don't like wearing foundation that much either, but i do like doing eyemake up and stuff.....so i know a lot about it i guess. okay, first of all you have to pick the right foundation- if you have acne prone skin, as i'm guessing most people here do, you need to pick one that is both non-comedogenic and oil-free. i personally use clinique "stay true makeup oil free formula" and really like it, it does not make me break out at all, and gives a really nice matte finish,it is $17- a little expensive- but it does use good ingredients, which is the most important thing when you are putting anything on your skin- especially something that is going to stay on there all day long. i'm sure you can find other foundations in the drug store that are less expensive, you just have to look around and find one that meets your personal needs, i had good luck and coverage with physicians formula products also, which are a lot less expensive......now, to apply the make up. i hope i'm not schooling you on something you already know how to do- just from your post i gathered you needed the total breakdown......so if you don't, i guess you can stop reading this now. anyways, to apply the makeup i use either cosmetic sponges or a small makeup brush. use the brush to put a small amount of the foundation on a acne spot, or use the sponge- dabbing in a cicular motion- to cover a greater area. some people prefer to put the foundation all-over on their whole face, i just like to use it for spot treatment, who knows which is better....some people also like to end with some powder to set the makeup- i only do this for a special occasion usually, cause i figure one less thing on my skin- the better if at all possible.....i've also heard people recommend some sort of green stick thing that you can put on red spots before the foundation that makes them less noticeable since red and green are compliments i guess,i personally haven't used one of these though, so i really couldn't say how it works. hope this helps, good luck! and also, even though you said you don't like to wear make up, sometimes i like to play up my eyes or lips say just to try to draw attention away from my skin......vain, but sometimes it helps.