They both sound like great ideas! "how to create a tutorial" under the Tutorials tab and "how to use your blog" under the Blogs tab should have all the info you need. If you have any questions just let me know.
Welcome to our network, good to have another person from the Bay I grew up in Whakatane myself. Great that you have plenty of experience too, perhaps you could share a little about yourself in our introductions section?
Anyway please feel free to have a look around the site and join in the discussion in the forums.