Exercise, leash, calmness and time
As others have said, when you reprimand your dog constantly it tends to cause an excitement/failure to listen loop. There are a few things to do.
First, walk and exercise your pup as much as possible. It leads to calmer interaction afterwards.
Second, rather than spray the pup or get into an endless series of ignored reprimands when she uses her teeth inappropriately, keep a LOT of different types of toys around and redirect the chewing to the toys. If pup persists, ignore her until he interacts more gently. This may take some time, and if she is really wild you may want to crate her till she calms down. Remember, however, that keeping calm is key.
Third, I would also keep her on a leash a lot while she is inside. Leave it loose, and so long as you are with her and watching to make sure she does not get tangled, this allows you to quickly get control when she is too excited. But remember, this is not to jerk her or punish her, but rather a means for you to calmly intervene and keep her from jumping, biting, etc.
Finally, spend some time on positive training - start by getting a long (20 foot) lead and teach her to come when called by being full of praise and giving a treat, then alternating praises and treats etc. As for training class, I really urge you to at least find a basic level course. This dog is going to be a huge commitment of time and money (dogs, and GSDs in particular cost a lot), and you will soon find that one destroyed item or other more unfortunate event will cost you far more than a class.