Since you have the PDF (or the physical book), here is the recommended workflow to retain the information:
This schedule uses the Shin Kanzen Master N4 Goi PDF for 30 minutes per day. Shin Kanzen Master N4 Goi Pdf
The modern language learner relies on Spaced Repetition Systems (SRS) like Anki. Having a PDF makes it easy to copy-paste example sentences and word definitions directly into digital flashcards, saving hours of manual typing. Since you have the PDF (or the physical