We're all different Tassie Grandma. There's no right or wrong. I have a difficult family history and bypassed shock and denial and went straight to white hot anger. That was with me for a few weeks and then I progressed to deep sadness with an ocean of tears. Seven months later I'm mostly dry now but still very sad.
You sound like you're a calm, pragmatic family. And it sounds as if your prognosis is good. Don't worry about not worrying! Your brain will do its thing to process the info in its own time.
This forum's been a lifesaver for me. Jump in anytime you have a question or need a whinge or rant. There's always someone about. Not a good club to join but welcome! K xox