What is your greatest sin?
Did you miss Day 31? If you did, go back and read that day before you continue to read Day 32.
Go to God and confess your sin.
But when you confess, make sure you focus on your Heavenly Father who desperately loves you. He is a Heavenly Father that accepts you for you. He knows your sin, brokenness, and issues. God desires to wrap His grace around you. But He doesn't want you to stop there.
The action of confession isn't about just telling Him, but leaning into God's strength to conquer your sin.