Assalamu alaykum Brother,
If your first wife is still in your nikah, or the divorce is revocable, then make every effort for a reconciliation inshaAllah. InshaAllah your new found appreciation of your first wife's qualities will strengthen your marriage (if you are still married that is). Allah subhana wa ta 'ala has made the women soft-hearted, and I am sure if you are sincere in showing your first wife, how much regret you feel of your previous treatment of her, and that you want to undo all the wrong you have done, she will inshaAllah give you another chance.
Unfortunately brother, if your divorce is irrevocable, then you cannot remarry your first wife unless she married/marries another man and he leaves her by death or divorce, and the marriage had been consummated. It is haram to conduct a marriage contract with the intention of divorce in order for a woman to return to her first husband. This is not from islam and is an evil innovation.
http://www.islam-qa.com/en/ref/109245
A man is not required to tell his wife he is going to marry another woman. But if he proceeds with the marriage then he must tell her:
http://www.islam-qa.com/en/ref/91962
There is no reason why you cannot be a part of your daughter's life. May Allah make it easy for you. Ameen.