Hey there, somehow, you've manage to find these series of articles on building on a mush. Some of these articles will be PennMush explicit (and marked as such), but there will still be various articles that'll help you in building in general.
These articles will cover good practices, and explain why they should be done as so. It'll give examples on how to use the various digging commands.
It'll cover the general guide lines on how to write a good descriptions.
Hopefully, I'll do a decent job of transcribing my experience of being a builder in order to help others in the future.