If you’re a complete beginner then this Korean video lesson is a good way to start. The lesson itself is mostly in English and then slowly introduces all the basics that are essential to starting to learn Korean. You may also want to learn how to read the Korean Hanguel alphabet in 25 minutes. Don’t worry about starting, a language takes a long time to learn usually so you just need to start with simple video lessons like this. You can subscribe to their videos here.