Hi and welcome. One thing that I always say to people coming to Korea is have an open mind and don't let anybody push you around. A lot of people have postive experiences in their first year but some don't and have a hard time as they didn't do enough research before coming here. If you are going to some country school then it will be a lot harder to get used to Korea than some big city, naturally. Korea is a totally different culture than you can even imagine so be prepared for it and study on the net about it. That's your homework!!!!
I'm sure that you will be fine. When and where are you going to in Korea?