Looking for someone who has been to Seoul for beauty treatments! Where do you recommend is the best place to go?

Hello! My name is View, and I'm planning a solo trip to Seoul to get some beauty treatments done 😄. My friends have told me that areas like Gangnam or Apgujeong have tons of clinics and beauty programs, but I'm still unsure about where to stay. Should I find accommodation near the clinics or closer to the subway station?

Has anyone been before? I'd love to know which area is good for international tourists who plan to visit multiple times or find it convenient for sightseeing, besides the clinics. I'm also unsure about accommodation prices, so could anyone share their experiences? 🥰 Please let me know if English is well understood there, as I don't speak much Korean.