If you are thinking of teaching in Korea, or even living for a while, but you have no background, you should definitely check out this YouTube channel.
LINK: Simon and Martina's Channel
This channel is run by a Canadian couple teaching English in Bucheon, Korea.
They even have a blog called 'Eat Your Kimchi'.
On this blog, they answer questions about working in Korea and others. They also have some teaching material to share with other English teachers in Korea.
Simon and Martina created this channel & blog to show what daily life is like in Korea. They have created over 90 videos and this is one of my favorites.
How to Dance K-Pop Style
This was created in 2008, so the songs are a little outdated, but it is still awesome!
Other than this video, they have uploaded videos that they find funny or interesting (such as transportation system, or crazy karaoke culture).
If you want to know about Korea by the real foreigners who are living there, these Youtube channel and blog are probably the best source that you can get.