There are zillions of Korean language learning aids on the Internet, but there are two that I especially like: KWOW (Korean Word Of the Week) and Korean Word of the Day. In spite of their similar names they are unrelated, both in origin and in method.
KWOW is an ever-growing list of weekly video clips by Professor Oh, aka Ramona Champion, each 3 to 10 minutes long. Each covers a couple of related words, first in an explanation and then in a short sketch. The explanation is simple, but the sketch is real-world Korean, subtitled in 한글 and in English. For language learners the first 60 episodes are the most relevant.
Korean Word of the Day is a page that refreshes itself every day, redacted by koreanclass101. It takes the word of the day, and uses it in one or two sentences and a few constructions, shown both in 한글 and in transcription. A click on a button gets you the text pronounced by a very clear and very pleasant female voice. There is a calendar allowing you to visit earlier pages.
There are tens of other excellent teaching sites, for example those by BusyAtom. I wish I had the time to do more of them. Ah, well, language learning is a slow process, certainly of a totally alien language like Korean.