Does anyone know anything about gardening?

Will this come, or should I prune the ends of the branches to stimulate growth?

It'll come, the plant needs to grow some leaves to be able to grow more. They won't grow much until it's warmer and may take a year or two, but if you look after them and the soil they are in, they'll prosper.

I'd leave the raspberries, they'll sort themselves out this year and then you can cut them back once the leaves are gone in the late autumn, early winter.