First you have to find a "Beauty School," in your area. Most of Esthetician schools are paired with a cosmetology school. After you finish your classes, you have to take the state test, and pass. Then you have your license!
You can go get a degree as a cosmetologist and then take some higher education classes to get an esthetician license. If you don't want to know how to do everything you can just get an esthetician license.