Chris welcome to the forum, glad you found us.
We have members from all over the world, so feel free to ask questions here- I'm sure you'll have a bunch of them, and folks on the forum are pretty helpful to folks starting out. We also have a lot of info you may find helpful in our FAQ section and I'm sure you'll find a lot of useful stuff in past threads as you browse around.
Pitsford Reservoir is a pretty well known fly fishing spot in the UK, so you may also be interested in info from our UK based sister site. Also, if you're in the UK folks on that site could give you some good suggestions on tackle that might be easier and less expensive to get in the UK and be able to steer you to some good local fly shops near you.
Here's a thread on Pitsford from the UK site:
Pitsford Reservoir - Tackle help please! - Fly Fishing Forums
But feel free to pop in here too-- and ask as many questions as you like.