The most well-known kimchi that most people think about (and which is also my favorite) is the one made from napa cabbage. If you want more Kimchi, then you can say "Yeogiyo" and the waiter will take your order.
A cultural difference I found was that people usually come into the restaurant, seat themselves and then yell out their order or tell the waiter their order as they walk in. In America, we probably would consider those actions rude since we usually politely raise our hands for the bill or patiently wait for the waiter to greet our table. In Korea and most countries in Asia, this kind of ordering manner is normal in local restaurants. Another interesting thing about Korean restaurants is that at the table, there are built-in shelves that hold chopsticks, napkins and eating utensils. So if you happen to drop your spoon, you could easily get another one. An interesting way that people eat is that they would use their metal chopsticks to pick up food, but use their spoons to eat rice.
When I came to Korea, I expected to hear lots of Korean pop music, especially my favorite boy band BTS. I was surprised that people in Korea mostly listen to American pop artists like Bruno Mars and Ed Sheeran. In the streets that are lined with clothing shops, both Korean and American music are played loudly, as if each store has its own theme. A popular song that I keep hearing these days is Gotta Go by ChungHa. I also hear lots of original songs from local talent as they play music on the streets of Hongdae (as seen on the postcard page), the cool cultural district in Seoul. Many passionate musicians come out to play music and perform dance covers for all to enjoy.