I find that a good textbook or two can really get your language learning started on the right track because you'll be learning the information in a way that's structured well and builds on itself. Here are some good ones for a beginner.
You're going to want to learn hangul before you fully dive into learning Korean. It looks complicated, but I promise it's way easier than you might think! Most are able to get the basics in just a day. I'm a slow learner and it took me about 3 or 4 d...
You'll need to start building your vocabulary up if you want to speak Korean! Here are some options. I also highly suggest using flash cards or Anki.
Some really cool other books that have been really nice for practicing or learning Korean.