Before anything else, learn Hangul. What is Hangul? Hangul (한글) is the Korean alphabet, and in my opinion, it’s a fantastic one. What you see is what you get. There are rules to learn in reading it, but no inexplicable exceptions. There’s no way pony and bologna would ever rhyme in Korean.
It seems daunting to learn a whole new writing system, but Hangul is actually not that tough. It can take anywhere from 2 hours to 2 days to learn, and then you’re set. No need for messing around with romanizations anymore.
I won’t teach it here, because that would just be a poor reinvention of the wheel. Here are a few sites that can teach you how to read Hangul: