A man I knew used to say that it took him forty-two years to learn three things:
1. That he could do nothing to save himself.
2. That God did not require him to do anything.
3. That Christ did it all.
If you learn these three lessons you will never be concerned about your "doings." Your part is to admit that you are a helpless sinner, unable to do anything to save yourself. Your part is to stop thinking of being saved by anything you can do or feel. Your part is to believe that Jesus did everything that was necessary. He finished the work of atonement, and paid the ransom price with His own blood.
When you stop trying to be saved by your own efforts and put your full dependence in the Lord Jesus who did it all and paid it all, you become a child of God, an heir of glory, and a joint-heir with Jesus Christ.