Can you tell us where you got the puppy from?
Who is the breeder?
Did the breeder get the ears cropped?
When were they done?
Are they still on a cup or are they posted?
Do you have a nice breakaway collar on her?
If so, attach a piece of rope to her collar and let it drag on the ground when you are with her and not expecting her to be on leash, this will get her used to something around her neck pulling on it occasionally without blaming you directly.
What do you want the puppy to do? Any particular role or activity?
When you go out in public, given that you are worried about parvo, I would carry her but make sure she gets to meet people and children, and hear and see strange sights. If you need to put her down in public areas, take along a towel or a mat and place her on that and keep her on it.
In Oregon, I would go to Home Depot and put her in a shopping cart and wheel her around (making sure she stays in there). Have your girlfriend help you by pushing the cart while you walk alongside holding her in there but seeing things and hearing and meeting people. Get people to give her small treats (tiny tiny pieces of food) from their hands (assuming they don't have a dog with them).
You HAVE to socialize her. But you have to protect her from parvo until she has had her shots.
You also need to get her enrolled in a puppy kindergarten class to socialize with other puppies - ONCE SHE HAS HAD HER SHOTS SHE SHOULD START CLASSES.