notsorted ordering Lundy sounds like a significant step for you, so yay you for taking it!
I understand the self-blame: not only is it a lifestyle for me, but after leaving stbxh and starting therapy to examine myself, it took me a long time to get over the feeling that, since I was so open and generous and keen not to be single and hadn't protected my own boundaries, then I must have brought the abuse on myself.
But I didn't. He chose to take advantage. There are only 2 abusers in my life -- my mother and stbxh. Every single other person in my life, when confronted with my co-dependent "failings" of being giving and self-effacing and self-blaming, has been nothing but thankful for my generosity, and supportive in the face of my self-deprecation. Only abusers take advantage; they choose to do so where others don't. Respectful people appreciate your qualities and don't seek to put you down just to give themselves a power trip. You are not the problem because you were abused; the abuser has a problem because he abuses.
In my view, when I see what was missing for me in childhood with an abusive mother, and a father who just said amen to all her bullshit, I would say that you have already given them the best lesson possible by leaving the abusive relationship. Even if unconsciously, they will have learned that it is not ok to abuse, that they themselves don't ever need to put up with it in their own lives, since you didn't.
You can further protect DC by validating them at every turn; making sure that they know their worth, and that they know that have the right to stand up for themselves, should their father ever try his put-downs and controlling behaviour on them.