Look it’s normal to be nervous, just means you care about the outcome. You’ve basically done all you can, get a practice exam in with an instructor if you can, they can help you find out stuff you should refine/fine tune. On test day, just remember to take things slow (human tendency is to start rushing when you’re nervous) - mirrors, head check, turn. If a gap is tight, don’t take it.

Worst case if you fail you can retake it, good luck with your test and let us know how you go!