Learn to read and write the Korean alphabet. Korean is written in blocks, and it is designed to be easy to read and write. It is read from left to right, and top to bottom. Utilize online resources such as YouTube to listen to what the letters sound like. Search for "Learn Korean alphabet" to find videos to help you learn.
Move on to learn basic words and phrases. Pay attention when you hear these words and phrases; you will begin to notice other words that are often used in conjunction with the vocabulary you know. Your vocabulary will begin to increase. YouTube is a great resource for learning basic words and phrases as well. Search for "Learn Korean." You will see words written on the screen and hear them at the same time, which will help reinforce your learning of the new vocabulary.
Join an online language exchange, such as My Language Exchange. You will meet with a Korean speaker who wants to learn English from you online, and you can practice your Korean conversational skills. As you come across words you have questions about, ask your conversation partner to explain them to you.
Speak Korean throughout your day. Say what you are doing at different times of the day to yourself, such as "It's time to get up and eat breakfast." Practicing will help to improve your grammar and vocabulary. Read Korean news and listen to Korean news broadcasts whenever you have time.