Informing Wife About Divorce In Advance

My wife is staying at her parents home since 2 months. We both want divorce but her father is not ready. We have tried a lot of mutual divorce but our attempts have failed. We have also sent them a legal notice of which the time limit is over and I have not received any reply to it yet. I have informed my wife that I will be sending you the talaq nama as per the Muslim law in which the instructions will be mentioned and then her 3 months of iddat period will start. The reason I did this is that I want her to know in advance and I want to end this on a good and friendly note. I am also planning to keep her updated after the talaq nama goes and I will inform her as to how and when I will be returning her belongings. Have I done the correct thing because personally I do not see any issue in informing her on advance as she is my wife.