Where do photo retouchers go to school?

iv been retouching photographs for about 7 years now and iv been going to photo school for 1 year now to get my certificate in photography but i realized photography isnt really want i wanna do for a living i want to be a retoucher and photography school is not teaching me really anything about it i do love it though but i wish i could find a school or program that would be specifically to retouch images