Ordinary optical shops can match glasses, but you must go to a regular optical shop or a bigger one. When optometry, you must let a professional optometrist optometry, or go to the hospital for optometry. If your glasses don't fit you, and then you wear them for a long time, it may lead to more fatigue of your eyes and higher myopia rate, so you should pay attention.
I suggest you go to Quanzhou Aier Eye Hospital, a medical institution approved by Quanzhou Fengze District Health Bureau. The medical equipment and medical expenses are quite good. You can go there and have a look.