Looking for recommendations: What are some good areas for a beauty trip in Seoul?

Hi! My name is Nim, and I'm a Thai person planning a trip to Seoul focused on beauty treatments. I've heard a lot about Gangnam and Apgujeong, but I'm still unsure which area is best for finding clinics and accommodation. Could anyone who's been there share their experiences?

I'd like to know what the differences are in each area, the level of accessibility, and any other things you liked or disliked. Where did you find good accommodation, and how long does it take to commute to find clinics? I want this trip to be relatively convenient as I'll be visiting several places.

I don't have a definite plan yet; I just want to gather information from those who have actually been there. Any recommendations? Thank you!