You need to go to Cosmetology School which depending on the program and your commitment can take anywhere from 18 - 24 months to complete
Unlike traditional colleges where a degree is completed in 4 years, you can find a cosmetology school that allows you to complete your training in 8 months to 2 years. There are many factors that go into this such as studying fulltime or part time or various school requirements. As long as you do your individual studying on what different schools require, you should be fine. On average, a full cosmetology program can be completed in 12 to 14 months.
To be a cosmetologist, you will need to check in your area to see what programs are offered. I attended a 2 year community college. There are private cosmetology schools and i had scholarship which was around 9 months and a university could be a year but it costs more when you take less years in college. Have your family or teachers or someone that can help you apply for as many scholarships as you can and the money or time you have will help you finish quicker.