Also, the SDK is not something required to use C2 as almost everything can be done through the events system.
As any other coding "language" it takes time and practice to get used to it, but C2's event systems lowers greatly the barrier. And if you really need to add some "external" feature through the SDK, the manual introduction gives the first steps to take.
I'm sorry, I'm still not sure I fully understand your point on prototyping though.
C2 is marketed as a quick prototyping tool. But it doesn't prevent users from going through the beginner's tutorials to get the basics of how C2 works and then moving on to "more complicated" programming/concepts.
And since there is a full section of the website dedicated to those tutorials which are categorised according to the "level" of the users, as well as the regular manual, that's why those aren't listed in this FAQ.
The FAQ focuses on specifics questions. "How do I realize that specific feature in C2".