At present, universities in South Korea generally provide scholarships for international students, and many universities can get scholarships with 50% tuition reduction as long as they are admitted. I don't know what you want from Korean cities. If you are in Seoul, it is easy to enter school and relatively difficult to graduate. If you choose a university in other parts of Seoul, there are certainly good schools outside Seoul, but it will be easier than Seoul if you want to get a diploma easily. Recommend several universities for your reference:

Hankyung University, Yangsong University, Southern University, Catulli University, Silla University, Giant Buddha University and Anglican University. . .

These universities are not very good, but graduation is relatively easy.

I hope I can help you. Good luck!