Adam,
When I first started I had to work a month before I had enough for 1x 1 hour lesson. but every weekend I was down at the flight school just talking to other pilots. Back seating for the joy of being inside the aircraft if I was allowed (I was only fifteen when I started) and washing aircraft whenever I could. Reward was one circuit per aircraft washed. fleet of three aircraft.
What I am trying to get at is that hang in there yes it will take some time but it is worth every cancellation I have had due to wx or instructors being F*(*its
And I recommend along with most other replies that 2 x 1 hour lessons in a day is betrter then 1x 2 hour lesson. That break for a drink/lunch and bathroom is ver much needed. I love stalling but 2 hours of stalling would throw most poeples stomachs. Cheers and good luck with your training