You will need to know Hangeul (the Korean writing system) eventually. You can’t become truly fluent without knowing Hangeul, and there is no good reason to not learn it, either, because most people only need a few hours to learn how to read and write Hangeul. But not knowing Hangeul yet shouldn’t hold you back, either. If you are not particularly motivated to learn Hangeul yet and just want to focus on the sound first, that’s definitely fine, too! But if you are ready to take on the fun challenge, we have a video course and a textbook to help you learn Hangeul in the best way possible.