Yep, my guess is that 1 hour behind boat = 10 hours sup foil or 20 hours prone foil at the start. It is a massive jump start to the learning process. Trick with the boat: to begin drive too slow to get up on foil. The optimal is to be behind the boat riding on surface with foil below you. Get a feel for foil in water. Start doing side to side slow turns, maybe get outside the wake. Then you'll find that on the far edge of some turns, when you speed up through the turn, you will come up on foil momentarily, then fall back down. That's how it starts. Then you'll find you can do little skateboard ollies and get up briefly. That's pumping. Now you're ready to increase speed a little, start getting up a little sooner and easier. Then once you're feeling that's pretty easy, then can speed up a little more. [don't do what I did and punch it to wakeboard speed...chaos will result....slow n steady]
I had a China knockoff of that gen1 foil. It works ok but not great. It'll work fine behind the boat. I found it doable with sup foil for beginning, though it's so slow it doesn't have much glide. I am concerned it may have too much lift to be doable prone surf foil. You can get away with a bigger wing sup, but in prone if the foil is starting to rise before you are done your popup, it goes badly.
Hdip advice is to help avoid the dreaded taco/switchblade wipeout, where foil meets face in a hurry. Kind of inevitable, but repeating his advice, jump off rather than attempt to save it. Try to get your hands up to protect yourself (though it happens SO fast). Wear a helmet first sessions ... you already will look dorky, may as well add to it by being safer.
