Learning Korean has exploded in popularity over the last decade, driven by the global waves of K-Pop, K-Dramas, and Korean cuisine. However, many beginners hit a wall. They learn random phrases from TikTok or memorize the alphabet from a free chart, but they fail to achieve structural fluency.
After finishing a chapter, do not start a new one for 24 hours. The next day, open the PDF to the exercises for the old chapter. If you score less than 90%, you haven't "completed" it. Redo the chapter.