Questioning Having A New Puppy

Hi everyone! I'm in need of some help from someone more knowledgable than I am. I live with my boyfriend in a 2 bed 2 bath apartment with our cat and our border collie who is 8ish. A coworker of mine's dog had quite a few puppies. Mom is a German Shepard/Red Heeler mix and Dad is an Australian Shepard. Both parents are pretty lazy. The puppy we would get is a female. Our border collie hates the dog park and all that so we would have to go there and do a lot more exercise (which is fine because I need to be more fit) but I don't know these breeds well. I know they are herder type breeds and are very active. And we can be active of course, I just want to make sure everyone wins. My boyfriend is 100% for it but I'm the more realistic one so I just want to make sure this is a right move. I would love to have a this dog and we understand the work a puppy is however I don't know the breeds well other than doing some research. Anyway thanks for any help.