I am sorry to hear this, but I just went through it all about 5 weeks ago, so I know your feelings and wish no one ever had to do this. That said, it is a gift for you both to spend the final moments together even though you know what is coming. He knows you're helping him, remember that.
Hospice is wonderful. Don't be afraid to call them ANYTIME if something changes or doesn't seem right about his comfort. I am sure your father is glad to be in familiar surroundings. I don't know what you're looking for as far as info. A few (brutally honest) things that I was unprepared for as this process unfolded:
-The intake stops and then voiding stops, the end is near. Or at least it was for my dad a matter of 2-3 days. Hospice will take care of it, but if your dad is eating, he should probably be on Senna or another laxative to avoid impaction.
-He will be unable to swallow meds. Hospice will discontinue any medications other than pain/agitation control, like morphine and atavan. They will give you a liquid of these to administer frequently (every 2 hours). These are absorbed through the mucosa under the tongue and the gums. The frequency will mean a family member awake and nearby 24/7 because one else (hired CNAs for example) can legally administer meds.
-Hospice should also provide a mouth moisturizer (toothpaste like) and some sponges on a stick (lollipop like). They should show you how to wet his mouth and then administer med. Even near the very end, my dad would suck on the sponge to get the water. The body's instincts are amazing.
-Hospice will use the term transitioning (IIRC) to mean that he is nearing the end. They should tell you things to look for, specifically, his feet will get cold first and then calves, moving upward as circulation slows. When hands get cold or your don't get a return of color when you press on his fingernails, it is almost over. He may get very high fever as his body no longer has the ability to regulate its temperature.
-You probably know this, but you should still talk to him. He can hear you . My father even opened his eyes and tried to speak the very moment before he passed.
-His breathing will probably rattle. As his breathing slows, you may think numerous times that he has drawn his last breath, but he will begin again. He may cough a lot as well.
-When he passes, you call Hospice, they declare, call the funeral director, and dispose of medication. They should also arrange for the pick up of any equipment. We had to push that along because as soon as it was over, we all wanted the hospital bed out of the house.
I am sorry if this crass, but these were the things that I hadn't given thought. Your parents appreciate this so much more than they can ever say. Also remember that regardless of how he looks or how you may feel, Hospice will keep him comfortable and pain-free on his journey.
I'll keep you in my prayers,