Hey, welcome to the forums. :)
A YouTube search managed to yield a few results, but Construct Classic was never documented in a comprehensive manner. Most of what's out there are, as you've pointed out, examples.
You're best bet at this point is to poke around with the software, look through the wiki, and ask questions if you have any specific troubles.
Alternatively, you could give Construct 2 a shot, which has a full user manual up on the website and plenty of people ready to answer questions about it.
I hope you've found some of this helpful. :)