The Sharepoint 2010 videos on lynda.com by Simon Allardice provide a GREAT overview of what you can do with sharepoint. It is not 2013 but almost all of the core values are there and you will feel more confident about taking steps forward in sharepoint.. Also, the book Beginning-SharePoint-2013-Building-Solutions http://www.amazon.com/Beginning-SharePoint-2013-Building-Solutions/dp/1118495896
has been an asset to me for learning SP best practices, tips and tricks. But also for helping me better convey what SP2013 can do for the users.
Hope this helps. The community here is pretty great, and there are endless blogs on how to do X in sharepoint. Laura Rogers is great, and Todd Klindt is like sharepoint jesus.
At the end of the day...google will be the only one you can rely on. /s