How can minors learn Korean in Korea?

Hello! I'm a student planning to come to Korea. I want to live in Korea for 1-2 years before I turn 18 to learn Korean. I originally planned to attend a preparatory school for immigrant students, but now that's not possible. My parents are thinking of giving up, but I really want to go. They said they would allow it if there is a place where I can learn Korean in a school-like environment for 8 hours a day. Does anyone have any advice on what to do in this situation? 🥹