Not sure you need to miss the wedding.
Tell us what you are having trouble with, and perhaps we can give you the
advice that can provide you with a "breakthrough".
What exactly is happening, vice what you think should be happening.
Windsurfing is not a particularly "intuitive" sport.
It differs a great deal from sailing a boat or dinghy (if that's where your previous
sailing experience lies).
Let us "coach" you a bit online.
If we can discover what exactly isn't working, there are instructional videos that may make a difference, but it would help to know in which direction to send you.
Hope this helps,