I agree with the above. Seriously, she's a pup! They're obnoxious and have the attention span of a gnat.
I think most people can't keep up with most dogs--from experience, even very calm sedentary dogs quickly adapt to working for 10 hours a day--a lot quicker than the people involved do.
And it's just like a parent chasing after a child--you know that kid is going to have way more energy than the parent does.
Puppy play dates are great because other dogs wear your dog out.
Otherwise, I think the best thing to do with puppies is just do your best and wait for them to outgrow it...just like babies and toddlers.
But you do also have to factor in the time. I devote at least 2 hours a day to my adult
GSD, and would expect to spend a lot more than that (though perhaps more broken up and spaced throughout the day) with a pup. And that's the bare minimum. GSDs are a high-maintenance breed, and puppies of any breed are high-maintenance, so...