Korean women are really reserved due to their culture, so usually, you'll need to naturally be friends with one or be able to talk to one. They're also (from my personal exp) pretty warded off from the thought of dating a foreigner, now obviously there's a lot of exceptions to that.
Just be nice and treat them with respect like a normal human and ez men.
tho if you want easy women just visit Australia, lol. Been living here for a year and a bit now and the women are really open & they get chucked around