I was literally terrified of going solo around 9 hours.
I thought bl**dy hell how am I going to be ready at 10 hrs which everyone reckons is the normal time.
Several of my very experienced pilot pals told that the instructor would know when I was ready,I probably wouldn't.
I went solo around 18 hrs but still got my PPL licence in 53 hours,which aint bad for an old un!
(just passed 63 when I got it)
My CFI said
"It is not a race,it doesn't matter how long it takes,and if you solo in record time, you could still end up a crap pilot"
Enjoy and good luck.
Lister