All bare root trees, raspberry, blueberry plants should be started indoors. These are dormant plants and will not have leaves. No leaves no sun needed. The sun will dry out the stock and kill the plant. So plant them indoors for the first two weeks or until you see leaves develop. The plant cannot protect itself or use the sun without leaves. It is hard on the plant and will struggle to survive. The plant is trying to establish a new home in the soil and it doesn't need direct sun for at least 3 weeks. If you purchase during the summer I would recommend planting out of the sun during the summer or until you start to see new growth from them being planted in the new soil.
When you are ready to put it in direct sun. Put the potted plant in morning sun to let it get used to its new environment. No plant should be transplanted into 90+ sun or if it is going to be that in the next 3 days. If you have further questions do not hesitate to call 919-696-0328.