Please talk to the breeder and see if she can stay with the mother for longer... Their mothers teach them SO much, you dont even know...they depend on their mother for warmth, biting, and sometimes even food etc...
With having a small breed puppy at 6 weeks old, it's going to be very hard... I got Izzy at 13 weeks and that was hard enough I can't even imagine having her home at 6 weeks... I would not even feel comfortable leaving her at home alone that young or going all night without being watched...
I know your excited
but the breeder really needs to keep her longer.. There are some states that can be fined for letting them go that young..
Your little sweetheart is BEAUTIFUL
and Im sure you want whats best for her
Good luck!!