Any advice on how to overcome nervousness about taking your first pax as a private pilot?
Unless you are expecting to crash whats the worry?
Take your CFI up
And your DPE gave you your certificate. He obviously thinks you are a safe and competent pilotYou are right to be nervous. It is a pretty big responsibility for another human, especially one you care about, to put their life in your hands. Just fly like you have been taught and don't try to show off or do anything that would make them uncomfortable. Don't take them up when it is windy or there are other weather issues that add risk or impact the comfort factor. Remember, you want them to really be awed by this thing we love to do.
Be aware as the PIC that if you say things unconsciously out loud like "damnit!" or "crap!" when something annoys you, it will really freak your passengers out.
+1
I scared the bejeezus out of a passenger once when the guy ahead of me started flying a 747-size pattern.
Tim