Hello, 

A deep love of cosmetics and passion all the things makeup is capable of is one of the first tell-tale signs of a budding makeup artist. If you like to experiment with different cosmetic looks and to try them out on yourself and your friends, you may discover a real knack for applying makeup professionally. If this is your passion, there are makeup artist schools which offer classes in all the different kinds of fashion makeup.
Each state’s requirements to become a certified makeup artist differ. Some states have a separate license where an individual can specialize only in this field. Other states lump the makeup requirements into a full cosmetology certification instead.

For a complete career guide to become makeup  artist  please refer the following link.

https://www.beautyschoolsdirectory.com/faq/makeup-artist.php#How-do-I-become-a-makeup-artist

Hope this helps,All the best....