You can go to the Language Institute of Korea University to learn Korean first. The language stage is generally half a day, and the rest time can be used for working. On the one hand, you can practice dialogue, on the other hand, you can earn some pocket money. In the language stage, the tuition fees of public and private universities are similar, but not much cheaper. At the stage of specialized courses (undergraduate or postgraduate), the tuition fees of state-owned universities are cheap, but there are fewer scholarships. Private universities are more expensive than state-owned universities, but the scholarships are higher, so it is better to decide the school according to what major you plan to study ~
If you have any questions, you can write to me in the station, and I can recommend schools and majors to you ~
I hope the above answers are helpful to you. Good luck ~