Best Korean Immigration Route

I am a Nigerian Male in my mid thirties, I'm looking for the best migration route to Korea. Currently, I'm a HSE Officer in an FMCG company in Lagos but also skill in building finishing(Screening and painting, wallpaper application, POP work, PVC ceiling installation, Suspended ceiling installation). I am also into Building Project Management and/or Supervision . I'm open to study route. I wish to acquire Master in any of these fields: Data Analytics, Public Health.