As Stu said, I would go for a smaller board once you can water start. I would get something a modern as you can, but 2nd hand. You will be breaking a lot of noses.
You want 'easy', especially now in winter. Don't expect to progress very fast. If WA is like SA, and you are like me, Windsurfing in winter becomes frustrating. All the good sessions happen in the week day. When one does line up on a weekend, I have a family commitment

. Sails in winter are few and far between.
Your (freeride) sail quiver looks good. You could probably have a 7 in place of the 6.5.