Hi Jack, Winging in your conditions is do'able but you're going to need the right gear for it..
In the modern winging world where very one is going smaller, smaller, smaller and beating their chest about it I went bigger.. I'm loving my new big board and also the world of light wind winging.. I'm 65 and 100kgs.. My board is the big 140L Hover which is 6'6"x 33".. My foil is the big HA2140 and my wing is the huge 7.5m MK4 WingSurfer..