But there are no such rituals that can lead to forgiveness now. That is the problem. Even when people seek forgiveness, are sincere, and do what they can, they are still not forgiven.
On a personal level, we need to forgive everyone, for our own sakes.
We can reach easily to Isaiah to see what repentance looks like, too:
6 “Is not this the kind of fasting I have chosen: to loose the chains of injustice and untie the cords of the yoke, to set the oppressed free and break every yoke? 7 Is it not to share your food with the hungry and to provide the poor wanderer with shelter— when you see the naked, to clothe them, and not to turn away from your own flesh and blood? 8 Then your light will break forth like the dawn, and your healing will quickly appear;