Ask For Help As You Get Ready
Your work is your responsibility. No-one else can speak for you at your viva. Still, make sure that you ask for help from those around you while you get ready. You don’t have to do everything alone.
Be clear with your requests. Ask early to set expectations and intentions. Get the right help from the right people. When the dust has settled from your own viva be willing to help others.
More than anything, look to those closest to you to help create a good atmosphere for your viva prep period. There are people around you who can answer questions about viva expectations but from some you might simply need space, time and quiet to do the work.