This is not specifically aimed at dads, but the breastfeeding book "So That's What They're For, Breastfeeding Basics" by Janet Tamaro is very funny and also accurate, and I recommend it highly. I think a dad would be amused and learn something too from it.
Take the time to heal from your marriage before you move on with someone else. Make a list of all the qualities you would like in a new partner and then work on growing that way yourself. ~mandib50