“Ready for the viva” doesn’t mean “not nervous about the viva”.
Ready doesn’t mean perfect in any way.
Ready and prepared aren’t quite the same thing – but they travel in the same car.
Ready for the viva means you’ve practically prepared and found some confidence for the day.
There’s always more that you could do to feel more ready, but a finite list of tasks is sufficient to get you ready.
Ready is personal. What does it mean for you?