Where is the best place to stay for a beauty trip to Seoul?

Hi, this is Asuka! I'm planning a beauty trip to Seoul next month, and I'm wondering which areas everyone stays in?

I'm currently considering Gangnam or Apgujeong, but I'm not sure what they're really like. I've heard there are lots of beauty clinics and facilities, and shopping sounds fun, but I'm also wondering if it's quite expensive...? How does it compare to other areas?

As a foreigner, I have some concerns. For example, language barriers, and how can I make reservations safely? If anyone has taken a beauty trip to Seoul, I'd love to hear which areas you recommend and where you stayed. Any information on transportation, atmosphere, anything at all would be greatly appreciated!

This is my first Seoul beauty trip, so hearing someone's experiences would be very reassuring. Thank you in advance! 😊