Beauty trip to Seoul - where to relax and which district to go to?

Hello, people! I'm from Mongolia, called Naran. I'm planning to go to Seoul later this spring to meet with beauty professionals. I've heard a lot about Gangnam and Apgujeong, but I'd like to know what the reality is. Has anyone been to those places?

Sometimes people say "Gangnam is so beautiful, the scenery is so high", but how is it really for foreign actors? What about Apgujeong - are those districts really the same, are the performances different? I'd appreciate hearing from experienced actors.

And one more question: what places have you stayed in within the district? However, I think that beauty professionals are usually located near the subway. Are you interested in expensive foreign tourists? Or do you need to find a place to stay on a budget? If you have any recommendations for accommodation in any of the places, I'd be interested!

I'm not sure whether the right turn of the ferry bridge is right or not - I just want to share my experience!