Planning a beauty trip to Seoul! Can you recommend any skincare products or clinic areas?

Hi, this is Chika! I'm super excited because I'm going on my first beauty trip to Seoul next month. I've been really interested in K-beauty for a while now, watching it on YouTube and things like that, but I really want to experience it firsthand.

So, I have a question: are there any areas in Seoul where beauty clinics are concentrated, and what kind of skincare experiences are truly worth trying? I can buy sheet masks, serums, and Korean cosmetics online, but I'm really interested in clinic treatments and products that are only available locally. I'd love to hear any recommendations from skincare enthusiasts!

It's my first time in Korea, so I'm a little worried about the language barrier, but I'm determined to do my best for the sake of beauty. If anyone has been there before, I'd love to hear about your experiences. Thank you!