Hey Lex, I just recently have been figuring things out as far as makeup as well, so here are things I would have told myself before I learned:
Learn your eye shape. I, for example, have deep set eyes, so makeup tutorials for deep set eyes have been the most useful for me to look at. I learned how to make my normally dark looking, tired eyes look awake and pop with a little white eyeliner and light eyeshadow in the inner corners of my eyes.
Also, figure out your skin tone, and figure out what works for your eye color and particular tone. I have a light olive complexion and have dark brown eyes, so purples and pinks work well for me.
Past that, go to
coastalscents.com, get some not so expensive makeup and play around!
Girl friends and YouTube have been my teachers but if you have the courage for a shopping center, go for it!!