What age can i go to trucking school and get my CDL

by isai flores
(Las Vegas, Nevada, United States of America)

Well I am wondering how old do i have to be to go to trucking school and what are the requirements. How many years of Trucking School do I need to become an OTR? or do they all go to trucking school in the same time and end in the same time?

P.S your information really helps me. i will be thankful if you get a chance to answer this.