You seem to have a talent to create an issue when there is none. There is a difference between a genuine desire to help your participants, and the need for a legal protection from those who might ask for money back or leave a negative review because the instructor didn't know what an obscure menu choice on their camera is.
I see no issue here, Slobodan.
I approve what is written in the description of the workshop.
I asked Hans a simple question.
You answered, thanks for doing so. But your answer brought about new questions. And I asked them
I'm not criticizing in any way.
But the way to learn is asking your questions to the persons who know more.
Or your sit on your doubts forever.