Bod, like everything else, I'm sure Steve or Matt could sort you out in 5 minutes in person, rather than trying to do it over the 'net.
In the meantime, stick your camera on Shutter Priority (TV) set a shutter speed of at least 1/300th - let the camera set the aperture. Zoom out to 300mm. Don't be worried about increasing the ISO if you need to to get that shutter speed. Go and take a few practice shots and see how you get on. You can do it now if there's adequate light. Don't worry about ISO/noise - we're just interested in camera shake.
