If im 18, do I have to hold a permit for 6 months before applying for a drivers license?

I m 18, and have finished my courses, I want to get my permit and then go to a third party teacher to take my drivers test and get the results and my license faster than waiting for the dps but I would like to know since I m over 18, do I need to hold it for 6 months like minors?
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