In reply to Radioactiveman: UK Rivers Guidebook is very much like UKC but for all things paddlesport... the first piece of advice will be to join a club but after that you're likely to get a lot of conflicting advice over how's best to progress.
General rule of thumb is that the greater your water confidence, the easier you'll be able to learn to roll a kayak, the easier it will be to develop all the other skills once you can right youself unaided...