The Quick Start Guide and the Tutorial Volume 1 can be found in C3dapp Studio.
When showing the Tutorials tab in C3dapp Studio, you can click or tap on ‘>>>‘ to expand the navigation tree for easier access to specific tutorials and other information.
A step-by-step guide for building a 3D app in C3dapp Studio can be found in the blog post: C3dapp Studio – a cloud environment for writing 3D apps in Java and running them on Websites
A step-by-step guide for using Desktop Java IDE in combination with C3dapp Studio can be found in the blog post: Write and test 3D apps in Desktop Java IDE before building them in C3dapp Studio for Website use
The PDF documents for the above two blog posts can be found on the download page.