I've always had GSDs, they are a fantastic breed and make wonderful, loyal family pets.
HOWEVER, dogs are made by their nature and their owners and you need to stack the odds in your favour. A couple of weeks is a completely unrealistic time frame for getting any puppy of any breed. You should give yourself a few months to research the breed which should include going to see some adult dogs (any decent breeder would be happy to show you their dogs and if they are not then they are not decent breeders). You should also research your breeder. GSDs are a complex breed, bred for a variety of purposes (work, show, pet) and you want someone who has specifically bred for suitability as a family pet over generations.
Ditto the health screening tabulahrasa mentioned. You should walk away from any breeder who does not have this information on both parents. Having just lost a GSD to CDRM it's a horrific disease and you don't want to go through that experience. Decent breeders will have long waiting lists but there is a reason for that!!! Don't be tempted by someone who has loads of puppies available. Decent breeders only have limited litters because it takes a lot of time and attention to do a good job. Also you should be able to view the pups with the mum a couple of times before taking one home (usually you can view the pups at around 5 weeks, perhaps again at 8 and take home between 8-10 weeks).
Training is extremely important. There are a lot of good books out there (anything by Ian Dunbar or Karen Pryor is usually good), there are many training methods, personally I am a big fan of clicker.
Again as tabulahrase mentioned getting a puppy is extremely demanding, they are super cute and fun, but they soil in the house, they chew things, they keep you up at night, they take time to learn how to behave, you need a lot of time to socialise them, etc. If you are thinking of TTC it's a catastrophic idea to get a puppy! Just read some of the threads on here of people tearing their hair out with young dogs and newborns. If you were a very experienced dog owner and really knew what you were getting in for, I would still suggest you rethink the timing, for a first time dog owner it could be a huge, and emotionally painful, disaster.