What qualifications are needed for a foreigner to work as an English instructor in South Korea?

Hello! I want to work as an English teacher in Korea, and I have a few questions. I have an associate degree from a community college; will this be recognized when working as an English teacher in Korea? Or is a bachelor's degree absolutely necessary? Also, I'm curious about the process of moving to Korea and finding a job as an English teacher. Is it easy to find jobs in areas with a lot of foreigners, like Gangnam or Hongdae? Lastly, I would like to know what qualifications or documents are needed to work as an English teacher in Korea. For example, certifications like TEFL, TESOL, CELTA, or visa requirements, etc. I would appreciate any advice or information from those with experience!