If you are thinking of putting the hive in the shed somewhere and expecting the bees to fly in/out using the door and the window ... well that just is not going to work very well, if it works at all. The entrance to the hive, the bees' door, needs to be open directly to the outside.
The shed will surely be good to provide shelter from wind and the elements (rain/snow). However, to use the shed install the hive right up against the North facing wall so their entrance is facing North and cut an opening in the wall that lines up perfectly with the hive entrance. Then provide a plank from the outside of the wall cutout to the entrance to the hive. They will land on the outside of the wall and then walk in along the plank into the hive. Try to keep the plank as short as possible, less than 15 cm long from their landing at the outside of the wall cutout and walking into the hive. If the window is on the North wall; Perhaps board up the window with plywood, install the hive in the window sill frame, and cutout the entrance in the plywood. I hope that gives and gets the idea of how to use the shed. You indicate you are in Australia (southern hemisphere), so ideally have their hive entrance on the north wall. If you were in the northern hemisphere, then you would place them to have their entrance on the south wall.
And - Yes, they will coexist just fine and peacefully with other colonies nearby. The risk will come when there is little forage (dearth) at which time the hives may try to rob from one another. When good forage returns, they will leave each other alone.
Hope that helps!