As far as your weight concerns, 25 years ago I owned and sailed a H14 turbo at sea. In those days I was also about 83 kg. (that weight I can never catch up nowadays).

I even used to sail also with crew (girls, young ladies)!

So, I never found myself to heavy for my H14.

I combined windsurfing and catsailing for the same 25 years and it's a great combination. But because you are used to planing, you will need some wind for the catsailing too.