Listening skills- and also pronunciation- can be acquired from watching dramas and listening to music. You need to be exposed to native speakers as much as possible. Also, learning the alphabet is a step that you definitely cannot skip. By knowing the letters you'll be able to read anything, so that's a huge plus. As for writing, I found that writing a small journal entry every day helps a bit. It doesn't have to be anything fancy, just try to use as many words as you know and simple grammar. I'd recommend TTMIK for beginner grammar notions and Quizlet or Memrise for vocabulary flashcards. Also, if you ever get stuck on a word, Naver has an amazing dictionary you can use ^^

Hi! I'm also beginning, and a kind person (Tony) answered me this when I asked something simiar: https://www.italki.com/question/367437 (Props to Tony! :D)