EDIT 7/20: Thanks for everyone's input, after reading and discussing it further me and my bf have come to the conclusion that a mini would not be a good choice. As much as I love and miss owning the breed, it's not gonna be in the books for a long time.
Picture is of my old mini aussie (40lbs) Skyy.
I'm currently 22, work full time and own a two year old miniature pinscher. Me and my boyfriend are considering a second dog to give companionship to my current dog.
My schedule is odd, I work 8-4 every other week, midnight to noon every other weekend, and on my "short weeks" work two 4pm to midnight shifts.
I walk my dog for 30-60 minutes every morning and after work. He comes with me on road trips, hiking, camping, and swimming.
While my last mini aussie was raised when I was 10 and was super chill and the best dog, I'm fully aware as a 22 year old with less energy and a full time job it might be a bit more difficult now.
I know most people say "don't get an aussie if you can't exercise them 4 hrs a day!!" but most dogs are adaptable to the owners lifestyle and I do enough activity to where I think I can handle it.
The second thing is I live in a 975 sq ft apartment, I won't be buying a house with a yard anytime soon so there's the added factor of not having a fenced in place to let the dog run. So either it's long line in the field or if the dog is trained, they can be off leash (like Skyy).