When does having a puppy become fun?

I believe I'm in what's called the teenager phase (Aussie Shepherd, 12 weeks old, home for 4) and this is miserable.

Obviously we have nice moments where I'm outside tossing the ball with her or doing a bit of sit / stay training, but I can't think of a day where I looked back and thought that having a puppy was fun or made my day better. This is absolutely miserable.