Forgiveness of sin is not what we do but what God has already done in His death burial and resurrection.
Forgiveness of sins is our inheritance in Christ.
We don’t confess sins but we confess Christ who is our sin.
He became a sinner that we may became righteous.
He became a son of man that we may became sons of God.
Confessing sins is being ignorant of God’s righteousness.
Confession: l am righteous through Christ Jesus. Christ is my righteous.