It must be a side effect of the Cubs games, but I find myself agreeing with Ned more and more often. ?
He mentioned the wind noise, then you also have the water noise of waves on the beach, too. You have the main lighting source, the sun, changing angles minute by minute. To mitigate that, takes reflectors and butterfly scrims, stands and/or grips to hold and aim them. So your project budget needs a line for crew.
The instructor would have to be mic’d using a boom and very directional shotgun mic, which makes wide shots a problem.
If this goes forward, it should be as a youtube video, with ad revenue. DVD sales will be small, and subject to piracy.