Looking for international friends who have been to Seoul for a beauty trip! Which area is the best?

Hi! My name is Kwae, and I'm Thai. I'm planning a beauty trip to Korea for the first time, and I'd like to find out more about it from other foreigners who have been there before. I've seen a few foreigners mention Gangnam and Apgujeong often. Has anyone tried those areas?

I'm wondering which area is best for a beauty trip – one with many clinics, good accommodation, and easy access, as I'll be there for 5-7 days. I plan to learn about Korean skincare and try new things, but I'm not sure where to go.

For those who have been there, please give me some recommendations, especially regarding areas that are easy to navigate, particularly finding accommodation and transportation. Are accommodations in those areas expensive? Or are there other better options? Thank you in advance! 🥰