Blueberries like acidic soil, so watering with rainwater rather than tap water is a good idea, as tap water can be alkaline.
Mulching with pine chips will also add a little acid to your compost, and feeding with tomato feed, when the fruit are growing is also a good idea.
I've been looking at blueberries to grow at my summer home, where there is not a huge amount of space, and found this:
Pruning blueberries
Blueberries produce fruit on branches that were produced the previous year. For the first two or three years of a blueberry's life it's not necessary to prune it much, apart from keeping the plant tidy. After this, blueberries need regular pruning to maintain plant vigour and high quality berry production. Prune them between November and March when the plant is dormant.
When pruning, take out any dead, dying and diseased wood. Locate the oldest canes and remove one or two at the base each year. Remove the old canes that don't produce much fruit to make way for younger, more productive canes.
Prune out low branches that will lie on the ground when laden with fruit and remove all twiggy wood on the ends of fruiting laterals.
Hope it's helpful.