Seoul beauty trip, which areas do you all stay in?

Hi everyone! I'm Yunru, from Taiwan. I'm currently planning a beauty trip to Seoul and would love to get some advice from you all. I've heard that the Gangnam and Apgujeong areas have many aesthetic clinics and medical beauty establishments, but honestly, I'm not very familiar with Seoul and don't know where would be most convenient to stay.

My main goal is to experience Korean medical aesthetics culture and discover new skincare treatments or procedures. Would staying near Gangnam or Apgujeong be more convenient for visiting clinics and beauty-related shops? Or is it okay to stay in other areas as long as I can easily access the subway? Do you have any recommendations or suggestions?

Also, I'd like to ask if any other foreigners have undergone beauty treatments in Seoul. Which areas did you find had a better atmosphere or more convenient transportation? I'd love to hear about your real experiences to help me plan my itinerary. Thank you all!