Answer this question to the best of your ability:
How do I know when I'm ready to move on to the next stage in my Vipassana practice?
Each stage in Vipassana practice has its own exit conditions for proceeding forward. It may take you months to move forward in stages, and that's to be expected. So use whatever time you've committed to in the stage that you're comfortable with before moving forward. You'll know when you're ready to move on to the next stage because you'll experience a deepening of your self-awareness and insight into the nature of reality, as well as a sense of inner peace and calm.