To install the Korean keyboard, you just need to go to System Preferences and click on Keyboard. From there, click on Input Methods and select Korean. It's ridiculously easy, and you'll be typing in Korean in no time. You can even customize the keyboard layout to fit your needs.
Once you've installed the keyboard, you can start exploring all the cool features that come with it. You can type in Hangeul, the Korean alphabet, and even use romanization to type out Korean words using the Latin alphabet. It's so much fun to play around with, and you'll feel like a total boss when you can type out your favorite K-pop song titles in Korean.