You should ask your state board of professional licensing. Ask them for the number of hours in the training required. You can even ask any prospective school, the pass rate for the state board exam to be a cosmetologist. Cosmo should be no more than one year for full time and the part time could be 18 months to 36 months.
1500 hours of schooling, then you will have to go to take your written and practical test and pass both test to receive your license