How do foreigners find clinics in Korea? I need some advice!

Hi everyone, I'm Tien, a Vietnamese person planning to go to Korea for some cosmetic procedures. However, I've never had a procedure before, so I'm a little worried about choosing a trustworthy place.

I'd like to ask the foreigners here how you usually find clinics? Does anyone have experience reviewing clinics online or anything to keep in mind? My biggest concern is communication – does the clinic have English-speaking staff or do they need an interpreter? I've noticed many people don't speak English very well, so I'm a bit worried.

My only goal right now is to find a place with free consultations or clear certifications so I can trust them. What other things do you usually check when choosing a clinic? Has anyone contacted them beforehand via email or phone? I'd really appreciate any advice!