it is much harder to pass these days - especially if you are a teen or early 20s male, and the examiners are looking for the slightest thing to fail you on....
an examiner told me this...he said there are too many drivers on the road who just mangaed to get through a 35 min test without messing up, but really are not good enough to be driving alone...and it frustrated them because they cant stop it...so anything they can fail you on, they will...
i was failed on one test because i looked out of the back window on a manouvre only 4-5 times...a few more looks and id have passed he told me...i was furious obviously.
you also dont know who else on the road could cause a problem for you
so like you say best waiting