You're doing well following these steps in studying the lessons!
Additionally, have you already checked out Fast Track to Fluency Lesson Checklist (available for Premium or Premium plus plans) ? To download it you can click on the disk icon below the lesson’s title and select “checklist” (lesson example: https://www.japanesepod101.com/lesson/absolute-beginner-1-say-hello-in-japanese-no-matter-what-the-time-of-day/?lp=153)
Regarding the Flashcards, they use spaced-repetition technology, that is: we sort your flashcards and serve them to you based on your performance. Words that you struggle with, you’ll see more often, and words you find easier, you’ll see less. Flashcards are spaced out and served up over time until you master them.
Additionaly, don’t forget to take the quiz in the Vocabulary tab to check out your learning progress!
After marking the lesson as complete you can check your study progress in your Dashboard (series that are shown there will have the % complete status updated). But if you ever feel that you need to review any lesson, they'll be available for a re-check
We hope this helps! Please let us know if you have any questions.
Sincerely, Cristiane (クリスチアネ) Team Japanesepod101.com