I'm new to canoeing - I'd like to have a go at Wildwater Racing

The best bet is to find a local club who can teach you the basics of canoeing first, see the BCU website for details of your local club. The BCU star awards are a good place to start, or perhaps the paddlestart programme for the younger paddlers. You can then have a go in a wildwater racer in easy or flat water to see how you like it.