The server is now open, but I'm likely to be restarting the server or clearing the world without any warning. Anything you make here is transitory at best.
I'm also likely to be AFK working a lot of the time and will be unable to explain anything. If you're familiar with Blender, the controls shouldn't be too unintuitive - the main thing is that crouching acts as a modifier key most of the time; for selecting it acts like shift and for transform tools it acts like control.
These are the server commands, with brackets notating optional components:
To change tools: /t[ranslate] /r[otate] /s[cale]
To add primitives: /cube /cylinder /cone /sphere /plane
To change your selection's color: /c[olor] r g b [a]
To smooth-shade: /shade 1 (0 to flat-shade)