Drupal Advanced Analytics
You might be able to use custom variables within Google Analytics. That way you can get all your sexy graphs in one easy place. 

You would have to use existing tokens or create some new ones and attach them to your users report to Google. 

You can then install : https://chrome.google.com/webstore/detail/jnkmfdileelhofjcijamephohjechhna?hl=en

This shows you what variables are being tracked. For example I track my users on what content type they are viewing, what taxonomy, tags, roles etc.

What you are asking for is very specific, so I think you would end up creating custom tokens.

As an example you could show all first time users by attaching the token [user-created-date] then filter in GA to only show today's date for that custom variable.