The Cakewalk Website itself has a lot of technical support... regarding various aspects of midi and audio recording and some of the specifics of Cake. Plus, Cake has been around a long time and has a lot of users, so there are some user sites/bbs like this one. It comes with a decent manual as well. Scott Garrigus has a book out called "Cakewalk Power" that can help the beginner-intermediate user. He also sends out a monthly (or so) e-mail news gram with info about recording that often involves Cakewalk and.or Sound Forge. His e-mail would be on their web site.
Finally, a Cake (and other big name programs) are pretty complex and involve understanding midi, audio, effects, mixing, syncing, etc. etc. to use ALL their power. You may not need it all, but it is there. So doing general reading on these topics may help.
I am not sure where you are in the process (beginner to expert), but I have found Cake to be a good tool for me. Hope this helps... take care.