Quick question! If I'm going to Seoul for beauty treatments, where should I stay, and which districts are best?

Hello! My name is Best and I'm planning a trip to Seoul soon for beauty treatments. I'm a bit confused about which area to stay in. I've heard a lot about Gangnam and Apgujeong, but what's the actual difference between them? Has anyone who's been there before had any experiences?

I'd love to hear from other international visitors about which district is best for finding beauty treatment locations and for accommodation. I want my accommodation to be close to the areas I need to visit; I'm tired of long commutes, haha. Which areas do you think are convenient and safe for a solo female traveler?

Also, has anyone stayed in a condo or Airbnb and had a good experience? Hotels are often expensive, so comparing experiences would be great. I'm looking forward to everyone's recommendations! 🙏✨