Hey Dan, you might want to join the Safety Bay Windsurfing Club! We organise lessons and have all the beginner gear so that you don't have to buy it. Our qualified instructors would be more than happy to take you on this journey!
Learning is also much more fun when sharing the water with other members.
If you're super keen, we might be able to organise a winter session or otherwise it's probably better to wait until the season kicks off.
See
m.facebook.com/safetybaywindsurfing/ or
www.safetybaywindsurfing.au/Happy to answer any questions.