Your anger may come later once everything is signed and dated. You are still going through the stages of grief and at some point, anger may come, but take that anger and put it to good use on something that you need to do around the house, etc. I will say this....anger takes up a lot of your energy and concentration.
Right now, you are still attempting to keep things peaceful and on an even keel and you've had/and continue to have other things on your mind. You are attempting to keep the connection open and still move forward.
The way to get off the phone when he goes on and on is to say, "I have to go I have something I need to do" and then wish him a nice day and hang up. You are not obligated to sit there and listen to all of that stuff.
One step at a time, one day at a time.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.