I don't know where the next learning to windsurf event is being held but as you say it was a great initiative and has from your feedback created the desired effect of getting people stoked again.
A friend of mine picked it up at 55 and he is always out on the bigger days with us and the ear to ear smile on his face is enough for me to know you are on the right track by trying the sport again.
The new gear is exceptional and will make your transition back into the sport really enjoyable. Have you thought of asking around at the schools for some advice and perhaps a trial of their newer gear with a more advanced lesson structure? The schools can be found on the WQ site.
www.windsurfingqld.com/links/lessons.aspxHope to see you on the water soon.