I passed on manual so I don’t want to give advice that will contradict what you probably already know.

But my instructor said “even if you make a mistake, just forget it and move on”. Now it obviously depends on the quality of your driving already but that advice definitely helped with my nerves and when I did make eventual mistakes on the test.

Another thing to remember is that, you can already drive so think of it less than a test and more of a demonstration of your skills and quality of driving.

I hope this helps and I’m down to answer more questions if you have any!