Forgiving yourself isn't the same as forgiving anyone else. You don't know how to forgive yourself because you frame it as accepting an apology from someone who doesn't deserve it. You are holding on to this portrait of you as a bad person but you acknowledge that you are ready to detatch from this person. But you don't realize that forgiving yourself is as easy as realizing that the bad person you used to be no longer exists. You don't say sorry and accept it and move on. The self is fluid. There is no one to forgive. You just learn from that person you used to be and shape your present self into the better person you will become. Sorry for the redundancy.