You can't teach without a passport from a country where English is the major or official language. South Korea only accepts foreign teachers from the UK, Ireland, the US, Canada, Australia, New Zealand and South Africa. You must also hold a degree from an accredited university in one of those countries. You can submit a diploma in any discipline - including science but you'll need a UK passport.
EU passports are no good. A TEFL/TESL or TESOL certification will help your application but it's unlikely that any school will give you a 2-year contract. But renewing might be possible after one year.
Most doctors stay focused on medicine. Taking a 2-year break between your BA and your MA, PhD, med school, internship and residency isn't a very wise choice and it will definitely affect yo adversely on down the line as you work toward your goal, but if you really want to spend 2 years in a Korean English academy, knock yourself out.
I would go and study for medical school, if that is what you really want. Whilst and at the same time figure out what it takes to become a first aid teacher. You, for obvious reasons, cannot become a doctor over night.
But it is a lot easier to become a first aid teacher. You can use that to practice as well.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.