I’m so glad you added Candy Coralberry to your garden! Since they only mature 2-2.5’ x 2-2.5’, there really isn’t a need to prune them. If there are any wayward branches, you can prune them back in the spring. For a white flowering version, check out Galaxy Snowberry. Wilke Landscape Center or other local garden centers might be able to help get them in stock for you.
Thanks for writing!