You can plant the blueberry bush in the fall when you receive it.  It's best to plant two varieties to allow for pollination.  The U of Mn has prepared an excellent article on growing blueberries - it answers pretty much all of your questions.   Here it is:  https://extension.umn.edu/fruit/growing-blueberries-home-garden

You can leave it outdoors in a container, but you need to be cautious when doing this.  First choose a cold-hardy variety, such as those developed by the U of Mn.  Your container should be large enough, but do protect the roots by placing yourit against the house foundation.  Then place mulch heavily around the plant with 12 inches of loose straw or pine needles.  Also think about burying the pot in the ground for the winter if possible, as this provides the best protection.  

You can also place your container in your unheated garage.  If you do that, do mulch it and water sparingly.  Container-grown blueberries are more vulnerable to winter damage than those planted in the ground, so if possible plant it in the ground.