My reason for doubting that you are ready are:
• firstly that you need to pay more attention to spelling and punctuation;
• secondly, and of more concern, is that you are going to be about 25 when your pet is ready to die. But in the near future you are almost certain to be a tempestuous self-centred teenager more interested in YOUR desires & crushes than in your pet's needs. After that you are probably going to want to go to a flatting situation for tertiary education - you are unlikely to find a flat (especially at a rent you can afford!) that will allow you a dog, plus you will have too little time for your dog what with classes, personal study, sports, cultural & social activities appropriate to tertiary students. Are you not then likely to want to travel the world, or at least travel the country searching for a job that suits you?
So unless:
(1) You don't intend to do ANY of the above things, just stay at home being unloved plus an unemployable financial burden to your parents,
OR
(2) Your MOTHER wants a GSD, but will allow you to share the work & training while you still live at home, then she'll happily take over once you leave,
- don't get a dog!
Those who advise that you are too puny to handle an adult GSD are incompetent trainers. You might be equally as incompetent - especially if you rely on the term "discipline"! But if you train a GSD properly, in a weekly TRAINING-club class that starts when your pup is 18-22 weeks old plus do revision on your own the whole time you are with your pet, and stay in classes until he is at least a yearling, size & strength are no problem - the dog never realises that it CAN pull you over.
We have children as young as 7 handling GSDs. One of our best handlers (she represented NZ at Crufts in the Junior Handler contest, where a German breeder watching Crufts then paid for her mother & her to attend THE Sieger Show so the girl could handle for him there) started in the ring at about the age of 5, with her mother running backwards in front of her so that the dog wouldn't stop gaiting.
I also very much doubt that you have researched as well as you think you have.
• How many training classes and GSD competitions have you visited, then afterwards talked to the owners and got permission to interact with their pooches?
• Have you studied "The German Shepherd Today" by Strickland & Moses?
• Which of the 400+ YahooGroups dedicated to various aspects of living with GSDs are you asking questions in?. Each group's Home page tells you which aspects they like to discuss, and how active they are. Unlike YA, they are set up so that you can have an ongoing discussion with follow-up questions for clarification. Most allow you to include photos.
• Have you studied the Links => Defining_a_GSD section, and downloaded then studied the Files => Choosing_a_GSD.doc, in http://pets.groups.yahoo.com/group/The_GSD_Source ?
• Do you have a door opening straight into a yard that is fenced to not just keep your pet home but to also keep stray dogs and stray brats OUT?
• Do you have a plan for where your pet will sleep that does NOT involve hours of being in a locked crate? Pups need to exercise their growing bones & muscles the whole time they are awake, and they need to go toilet far more often that YOU do. Catch 22: An enclosure small enough to invoke the "don't mess until I get away from my nest" instinct is too small for it to exercise in. But an enclosure big enough to exercise in is big enough for it to get away from its nest to piddle/poo.
• Do you know that the proper age to get a pup is when it is 7-to-9 weeks old?
• Can you stay home 24/7 for at least the first week - preferably fortnight? That is needed to help the pup trust that you will always be there when it wants company or protection. And it is needed so that YOU can observe it with 100% of your concentration, to learn its timing & signals for "Wanna go toilet" and "Wanna BITE something" then take appropriate action. "Discipline" is NOT a word you should apply to a wee puppy, any more than you should apply it to a 22 months old toddler.
• Does your household schedule allow you to attend the local training club's weekly classes?
[Killer Precision] is NOT an expert - he doesn't even know about proper ages at which to neuter! He & you will find the research reports on that in the group linked to above.
[feeKITTY]: No GSD is allowed to be more than 88 lbs.
Les P, owner of GSD_Friendly: http://pets.groups.yahoo.com/group/GSD_Friendly
"In GSDs" as of 1967