I understand the frustration with the lack of documentation and I am working on it. But if you already have even a small bit of knowledge and willing to share it - please do. The documentation pages are made as wiki so everyone can edit them. Find 'edit this page' menu at the bottom right and just add your example, comment or anything else which might be useful to other people. Don't be afraid - I will correct things if anything goes wrong and there is always page history available to revert back.
The wiki uses Markdown format and the list of available commands is in the right column during editing.