For you are free, yet you are God’s slaves, so don’t use your freedom as an excuse to do evil.
1 Peter 2:16
Being absolved of all your sins and being under the protection of Jesus Christ doesn’t give you license to sin. A healthy fear of God, recognizing his sovereignty, is needed. We are to have new hearts, a new life, and a zealousness to right. You can’t “do” anything to become holy, it’s a lifelong endeavor.