How do foreign visitors find reputable clinics in South Korea?

Hi everyone, I'm Nga from Vietnam. I'm planning to go to Korea to try some beauty treatments, but since I've never traveled abroad for this before, I'm a bit nervous. I've seen many people from other countries share their experiences online, but I'm not sure how they choose clinics to feel confident about it.

Could you guys help me share your experiences? For example, which channels should I search through, or what things do I need to check before booking an appointment? And what worries me the most is the communication issue — do clinics have Vietnamese interpreters, or do I need to speak English or Korean?

Thank you so much. I'd really love to hear real experiences from you all before I make a decision.