Recommended areas in Seoul for a beauty trip + where to stay?

Hello everyone! My name is Bunga, and I'm planning a trip to Seoul specifically for treatments and exploring beauty spots. I'm still unsure about the most strategic location to stay.

I've heard that Gangnam and Apgujeong are hotspots for clinics and salons, but I've never been there. For those who have been, which area is the most worthwhile? Do you have any recommendations? I want one with easy transportation access and close to where I'm staying.

By the way, do you usually stay in hotels or Airbnbs? Any suggestions for good areas for foreigners and convenient for getting around? My budget is flexible, but I want comfort and safety, hehe. This is my first time traveling solo to Korea, so I'm a little nervous. Thank you for sharing your experience! 💕