I have been an apprentice in a photo studio for a year, but I haven't learned anything yet. Is it reliable to be an apprentice in a photo studio?

Being an apprentice and a photography assistant is actually a handyman, an apprentice for three years and a cook for three years. It depends on your understanding. You usually learn it from the teacher. In this line of work, your daily contact is related to photography. How can a photographer really teach you how to operate a machine, how to use light, how to compose a picture and how to use colors? If you succeed, their work will be worried. Who would do such a stupid thing?