I suggest you try not to teach yourself this language, at least in the initial stage. Wasting time will also affect your real mastery of this language in the future, because if you make a mistake, it will take more effort to get back to the correct pronunciation and learning methods than if you have never studied before, and it will also hurt your confidence and will not be good for your language learning at all.
Of course, if you don't want to learn this language at all, but just want to learn "hello", "thank you", "goodbye" and "I love you", you can learn it by yourself. In this case, you can find a website online, study it twice, or watch a Korean drama without taking up time and money.
If you really want to learn how to communicate with others, the suggested steps are:
1 Find a regular local language school. If you are studying in a university, then all regular colleges and universities have language courses or provide language training.
Use regular textbooks, start with basic pronunciation step by step, arrange appropriate class hours every week, and study under the guidance of professional teachers.
You must learn at least the first book of standard Korean before you can complete the basic part. If you want to do basic communication, I suggest reading the second book. After learning the second book, watch more Korean dramas and learn more about the cultural background and customs of South Korea.
If you plan to study in Korea, you should study hard and try to finish the third book of Standard Korean in China. It is suggested to learn Korean from domestic professional teachers as much as possible. The more you learn, the less you will spend in Korea in the future, the less you will suffer, the greater your choice and the wider your future development space.
Of course, if economic conditions permit, you can also choose to study Korean in Korea, such as attending short-term training in winter and summer vacations, or experiencing short-term travel. Or just studying abroad. South Korea is a country where working-class people study abroad. If you can't study in a first-class university in China, you can choose to study in a first-class university in South Korea. In this case, learning Korean will really change the course of your life. I hope it helps you! Good luck!