I've decided on a beauty trip to Seoul! Can you recommend some skincare products and facilities?

Hi, this is Saki. I finally have some time off, so I'm going on a beauty trip to Seoul next month! To be honest, I'm so excited. I see a lot of information about Korean cosmetics and treatments on social media, but I wanted to post this to hear from people who have actually been there.

First of all, I'm really curious about skincare routines. Korean people have such beautiful skin, so I want to know what products they use and what kind of skincare routines they follow. Also, I've heard that there are many beauty clinics in Seoul, so I'm wondering what kind of treatments I should try... I'd like to choose a place that's beginner-friendly, safe, and reputable.

I'll only be there for a week, so I want to make the most of my limited time. If you have any information like "This was really great!" or "This area has a concentration of beauty spots," please let me know! I'd love to hear about anything, like budget considerations and recommendations for beginners.