She sounds like a normal, but slightly timid, puppy.
With timid pups, it is very important to never force them to do anything they don't want to do, meet people or dogs they don't want to meet, etc. Also be aware that puppies go through fear periods where they may be afraid of things they had no problem with before (you can google it to read a bit about them). If she wants to retreat, let her. It's important that she knows she can get away if something is scary instead of her resorting to looking scary to make the scary thing go away. If she approaches something that is scary, praise her for he courage, but don't force her!
Puppies are mouthy until they are around 6 months old. Shepherds are land sharks. Puppies who are separated from their litters too early, like your pup, are also notorious for having bite inhibition issues because they never learned to control their bite with their litter. You are probably looking at 5+ more months of dealing with her mouthiness before she stops, to be quite honest, but patience and consistency will get you there. If she bites you, redirect to a toy. If she continues chomping on you, get up and walk away. Step over a gate, close a door, whatever, but she will learn that when her teeth touch your flesh all fun stops and you leave.
Puppies simply can't be trusted to make the right choices when it comes to chewing on the right things. Puppy proof your house as much as possible, so pick up anything she isn't supposed to have. Redirect when you see her try to chew something she shouldn't. If you can't supervise, put her in a pen, a complete puppy proofed room, or a crate so she cannot chew on anything she is not supposed to.
With timid pups, it is very important to never force them to do anything they don't want to do, meet people or dogs they don't want to meet, etc. Also be aware that puppies go through fear periods where they may be afraid of things they had no problem with before (you can google it to read a bit about them). If she wants to retreat, let her. It's important that she knows she can get away if something is scary instead of her resorting to looking scary to make the scary thing go away. If she approaches something that is scary, praise her for he courage, but don't force her!
Puppies are mouthy until they are around 6 months old. Shepherds are land sharks. Puppies who are separated from their litters too early, like your pup, are also notorious for having bite inhibition issues because they never learned to control their bite with their litter. You are probably looking at 5+ more months of dealing with her mouthiness before she stops, to be quite honest, but patience and consistency will get you there. If she bites you, redirect to a toy. If she continues chomping on you, get up and walk away. Step over a gate, close a door, whatever, but she will learn that when her teeth touch your flesh all fun stops and you leave.
Puppies simply can't be trusted to make the right choices when it comes to chewing on the right things. Puppy proof your house as much as possible, so pick up anything she isn't supposed to have. Redirect when you see her try to chew something she shouldn't. If you can't supervise, put her in a pen, a complete puppy proofed room, or a crate so she cannot chew on anything she is not supposed to.