As a beginner with makeup, I found, a great way to learn about cosmetics, their purposes and tips is on YouTube. It is filled with videos teaching makeup techniques, how to's and even just great inspiration. Down below are some of my favorite "Beauty Guru's" to watch and who really helped me learn!
Just click the link and it will bring you to their page on YouTube with all their videos.
Here is one who just does nail polish tutorials but is fantastic: