Heading to Seoul soon! Anyone have recommendations for Korean beauty treatments?

Hello everyone! I'm Shihhan, and I'm super excited to be visiting Seoul next month! Besides shopping and eating, my biggest wish is to experience Korean beauty clinics and skincare products. I've heard there are many places in Seoul for skin management and micro-treatments, but I honestly don't know where to start and I'm a bit unsure about the budget.

I'm mainly interested in trying Korean-style skin treatments and understanding the general consultation process. However, since my Korean isn't great, I'm wondering if there will be any issues for foreigners. Does anyone have any experiences they can share? I'm particularly curious about areas with a high concentration of beauty clinics or specific treatments that are worth trying.

Also, I wanted to ask if anyone has used local Korean skincare brands. Are the ones available in Taiwan really not cheaper than buying them locally? I'm looking forward to your suggestions, thank you!