I just wanted to quickly say, if you feel you'd like to keep it secret do it. It's not like it's a bad secret, if that makes sense.
I was super nervous about taking my test, but I passed first time due to the advice that my driving instructor had given me. She told me that the examiner wants to pass you, they don't want you to fail and aren't trying to trip you up so that you do. They just want to ensure that you are absolutely safe to drive. If you make a mistake, correct it with the correct procedure. For example, I touched the kerb when I was reversing round a corner, but because I corrected my mistake in a safe manner (stopped, handbrake, neutral, checked mirrors, first gear, indicated, checked mirrors, drove back round to starting spot, stopped, handbrake, neutral, checked mirrors, indicator, reverse gear, checked mirrors, did manoeuvre again) it wasn't counted as a minor. I still did the manoeuvre correctly, even though it was my second attempt. The main thing was, I did it safely.
You don't have to be perfect, you just have to be safe. That includes things like ensuring you leave the correct stopping distance, making sure you aren't over the speed (or too far under - I got a minor for that), making sure you are always obviously checking your mirrors, that you have correct procedures for manoeuvres, that you have lights and wipers on if necessary, that you put your seatbelt on and adjust your mirrors before you do anything else etc.
I wish you the very, very best of luck with it.