I'm going to Seoul next month, any recommendations for skincare or treatments I absolutely must try?

Hi everyone! I'm Anggun, and I'm new to this community. I've booked my tickets to Seoul for next month and I'm super excited! This will be my first time in Korea, and honestly, I'm really eager to explore the world of K-beauty and aesthetic treatments there. My skin is quite sensitive, so I'm hoping to get direct consultations with specialists who know what works best for my skin.

Can anyone share their experiences with good clinic areas in Seoul? I've heard many recommend Gangnam or Myeongdong, but I'm still confused about which ones are worth it and which are just marketing hype, haha. I'd also love to know from those of you who've had consultations, what was the process like? Do you need to book far in advance, or can you just walk in?

Oh, and skincare products too! I know Korean skincare is super famous, but there are just too many options. Are there any products you personally love and would recommend? Or do you have any tips regarding prices at counters versus online? I'd also like to know from fellow Indonesians what treatments you've had that you recommend, or if there's anything you think is worth trying.

Thanks so much for your input, I really appreciate it! 💕