You made a good choice using the Moses foils as they are strong, fast and reliable. I have found that 790 is a very versatile wing that can be flown in many different conditions. As far as the boards go the Wizard family of boards has proven themselves as the leaders in foil board design with there short wide stance. They are much easier to waterstart then traditional boards and are very well balanced.
I also started foiling at a spot that is windy and choppy but I feel that helped me shorten the learning curve. Also with the wide boards you don't need as much volume so a 125 or even 105 for 65kg is sufficient as I'm 92kg and I now use the Wizard 105 as my lite wind board. I'm only in my second season so my opinion only holds so much water.
Just keep your focus and get as much time on the water as you can. It's very addictive once you start driving the foil hard and fast like a windsurfer.

This is the MOSES 790 on a 25 knot day
The board is a custom 4'9" modeled after the Wizard boards.