Hi i have a raspberry, blueberry and blackberry bush/tree i got from lowes, i have no idea how old they are and I'm not sure how to properly prune and/or care for them, I've read up on pruning but not any help with new plants
Certified GKH Gardening Expert
You will not need to prune until fall for your Blackberry and Raspberry, after harvest.
These articles will help you.
Depending on the size of your Blueberry plants you may need to do an early spring prune.
This link will help you.