I was lucky enough to have an ex RAF instructor with 1'000s of hours and had 100% confidence in him.
I never gave any thought about my first solo, I just loved being in the air so it was a suprise whe he jumped out and sent me off, less than eight hours
Your instructor's experiance and your age will all be factors to consider.
With a 200 hour instructor and a 50 year old student I suspect it will take longer than a 20,000 hour instructor and a 20 year old student.
But then again, how long is a peice of string !!
Just enjoy your flying, that's the main thing !