Which districts are you all staying in for your beauty trip to Seoul?

Hi everyone! I'm Na, from China, and I'm planning a beauty trip to Seoul. I'd like to ask for your advice. I've heard that Gangnam and Apgujeong have a lot of clinics and a very professional atmosphere, but I'm not familiar with these areas and don't know where to stay for convenience. Have any of you had treatments or stayed in these areas?

I'd mainly like to know: What's daily life like in these areas? Is transportation convenient? What are some good restaurants or places to visit nearby? Also, if it's my first time in Seoul, would staying in these areas be too expensive or inconvenient? I'm not particularly concerned about luxury hotels; I just want something comfortable, safe, and close to a clinic.

Furthermore, besides these two areas, do you have any other recommendations? Has anyone tried other places? Looking forward to hearing your suggestions!