Going to Seoul next month, any recommendations for skincare & aesthetic experiences that are worth it?

Hi everyone! I'm Dewi from Indonesia, and I'm so excited to be going to Seoul next month for two weeks. My plan is to focus on finding good skincare and aesthetic treatment experiences, as I'm really curious about K-beauty and how the treatment system works there.

Can anyone recommend a good spot or area to explore? I've heard that there are many local aesthetic and skincare clinics in several districts, but I'm still unsure which ones are legit and worth it. My preference is for natural-looking treatments, not extreme ones, and a skincare routine I can maintain at home.

I'm also curious: is it better to book in advance from Indonesia or can I just come and explore? Budget-wise, I'm trying to prepare, but I don't know exactly how much treatments cost there. Has anyone ever walked in and gotten an appointment, or is it safer to book ahead of time?

Thank you in advance! Excited to share your experience later, hehe 🥰