If you created the folder 'music' under Documents, the path to that location would actually be:

//home/user/MyDocs/.documents/music
The dot in front of documents indicates that the directory is hidden. I presume that nokia did it that way to make it more difficult to find the directory and delete stuff (I guess). Hope that helps. Please note, however that I have a 770 (not an 800), and I don't use canola, so I'm kind of shooting in the dark here. . .

As for a newbie forum, I don't know of any specific to the Nokia, but any knowlege that you can gain about linux generally will certainly help you. Good luck! K.