Anyway too wide question, but pheraphs on a wide board I'd start with a cheap dacron school sail like the one I've just bought used on ebay.de for my girlfriend, 20 euro + 7-8 of shipping. Superlight and easy to use on various types of masts.
Decathlon boom for beginners, no extension, cut down at about 180 cm, 20 euro at local Trocathlon market, 70 euro +shipping for an used Fiberspar Breeze mast. Almost he lightest and cheapest rig ever seen, if my girlfriend doesn't start windsurfing with it my attempts are over...
Here I'm, testing it in 3 knots: