technique - How to wake up a character from a first person perspective?

I am currently trying to write a story, I already have a rough outline of the plot. But the only thing that's holding me back from moving forward.

The prolouge involves the main character waking up to find his father coughing up blood in the toiler (don't ask). We later find out (Chapter 1) that the main character's father has developed Super Cancer (it's a fantasy story).

My question: You know when someone wakes up? well I need to translate that into a firt person POV