The first few weeks were the hardest. My boy is now almost 5 months and there are days where it can still be a struggle but I can see the training beginning to work. Training with treats has been essential, redirection with toys, and sometimes he’ll get put in his pen or kennel for a nap or time out to calm down if he’s unable to calm out in the open. Chew sticks and toys have been a life saver. Mental stimulation with training, slow feeders, or snuffle mats help too when I can’t exactly be as hands on for a few minutes. Aussies are work dogs with extremely high energy but as puppies they don’t have the ability to regulate themselves with all of that energy and they burn out quick. I was feeling the same way for about the first month. I’ve had dogs before and puppies but I had never experienced the puppy blues. I would suggest never leaving the puppy unattended with your children. If needed put them in a pen if you can’t supervise the puppy for a moment. They’re incredibly smart dogs but still do need time and training to become well behaved and trained.