Couple quick comments.....
The pup you are holding is an Australian Shepherd - aka Aussie.
There is another breed which is different called an Australian Cattle Dog, aka Blue Heeler, Red Heeler, or Queensland Heeler. But they are never called "Aussies". That is the nickname for the Australian Shepherd
only.
While these dogs were breed specifically to help ranchers manage live stock, it's a complete myth that they require large yards and/or lots of farm animals to herd in order to maintain them properly. I can personally attest to the fact that they are perfectly happy to stay inside in the air conditioning and bide their time until such time as their human takes them outside for some horseplay and romping around (which they love to do, BTW).
I encourage you to check out some of the rescue organizations for any Australian Cattle Dogs or A. Shepherds who are waiting for their forever home.....they are extremely devoted and easy to care for.
Some video of my 2 girls: