What do you do now and what do you plan to do there? Do you speak and write Korean?

Korea is not an easy place to find a job if you are not Korean. Period. The easiest and most popular job for non-Koreans is to be an English teacher but you have to be from the list of approved countries with English as the first language. Malaysia is not one of them. I heard and read that there is a demand for programming and engineering jobs for non-Koreans but I dont have the details. You are also unlikely to get a work visa without a sponsor.

As for me, I am in the communications field. I quit my old job in an international agency in KL and while on a break, I was asked to join my Korean branch. I don't need to write or speak Korean in my current job which is not very common in Korea.

Average salary in Korea for professionals is about 2k to 5k usd per month. Living expenses in Korea is probably medium-high, somewhere between Singapore and Hong Kong. Monthly expenses are from 500 usd to 1.5k usd per person excluding rent.

The rental system here is kinda complicated. You may need anywhere from 1k to 30k usd as rent deposit with monthly rent payments from 500 usd to 1.5k usd on average for a room or small studio.