Welcome, lots of good information and knowledge here.. Though i will point out to you that there is no such thing as a "blue nose pit".. This is a term highly used throughout BYB's as a selling point. There is only one "kind" of "pit bull" and thats the American Pit Bull Terrier. Other breeds including American Bully, American Staffordshire Terrier, Staffordshire Bull Terrier, etc all fall under the same "pit bull" title under most laws and public perception.
If your lovely pup is blue chances are you have yourself an American Bully, American Staffordshire Terrier or some mix of either...or both. Blue is not a common color the APBT as this color in the old days was not a color sought after because it wasn't considered a proper bulldog color. The genes that create this "color" (a dilute black) is virtually non-existant in the breed though you do have the occasional pop up..
Regardless of what you have welcome, the community has a bit of everyone so i'm sure you'll fit in.
Also you may want to check out some threads on bite inhibition. 6 weeks is a little young to be away from the rest of the litter so your pup is going to miss out on some important learning skills from being separated before she should have been.
The good news is that you're in the right place to gain some invaluable knowledge on the breed(s) known as "pit bull". Welcome to GP!