If there’s a part for you to play in the new covenant of grace it is simply this: TO BELIEVE. So what does God want you to believe? He wants you to believe in Jesus and His finished work, that you are completely forgiven of all your sins and that Jesus’ blood cleanses you from all your unrighteousness and lawlessness.
Examples of finished work include salvation, redemption, healing, prosperity and eternal life
This includes the gift of no condemnation so stop walking around with your sins and live in peace.