There are numerous HubPages out there describing all things HubPages. I find that you can learn a lot from seasoned Hubbers. I will recommend 2 links for you. First, my own "guide" on HubPages which will give you some suggestions on how to get started on HubPages. Here's the link: http://hubpages.com/community/So-You-Want-To-Be-A-...
Probably the best resource for learning about HubPages is the Learning Center. I am sure that almost all of the questions you have can be answered by reading the articles. Here is that link: http://hubpages.com/@learningcenter
I hope that this helps! Good luck!