Our dad has been diagnosed with pancreatic cancer with a life expectancy of 6 - 9 months. We don't know what to expect or what happens next

Hi, my dad was diagnosed with pancreatic cancer 6 weeks ago, with an estimated 6-9 months life expectancy. They are not treating him as he is 78 with other health issues. We have done some research and are fully aware of how quick the decline can be.

He seems well at the moment but we really don't know what to expect next. We want to be mentally prepared but don't know what's coming next or how to look out for it.