Howdy dudes and dudettes! Well, it's pretty simple. If you've got questions about your Nikon D3100, you can start a new discussion and get tons of helpful replies from other D3100 owners all across the world, including yours truly. :)
To get started, go ahead and 
register an account here at Camera Tips.
To start a new topic or discussion, just click the 
Ask a New Question button in the upper right hand corner.
To reply to a current topic, just click a thread below and you'll see a 
Post Comment button towards the bottom of the discussion.
Happy shooting!            
 
                      
      
Comments
Nikon 35mm f/1.8G AF-S DX
Interest Potraits
And Experiments
Having my first baby girl (I found that many of us buy cameras mainly for this reason :))
Have a Nikkon D3100
kit lens and AF-S Nikkor DX 55-200mm 1:4-5.6
This site seems to be a great place to start.