Is there a good tutorial overview on how to use Google calendar effectively? I am most interested in using it to coordinate multiple calendars for family and work group members, as well as syncing with various devices.
Google's official resources are very helpful. Especially if you're having trouble with something in particular.
Just remember that the site was designed to be intuitive and not complicated. It shouldn't require an in-depth tutorial to get started. For me personally, I just started using it and whenever I had something I needed more information about, I just referred to Google's documentation.
There is series of video tutorials on YouTube on using it.