How lovely
.
Briefly, you can tidy up some soft excess growth now but don't cut into any woody parts. The main pruning is done in winter when it is dormant and not in leaf. You will be able to see the main stems and decide where you want them to be. They can be tied onto wires or trellis, whatever suits you.
Then all the side shoots are cut back to a a couple of buds from the main stems.
It will love any sort of compost or feed you can give it.
The main thing is not to prune in the Spring when it starts growing as the stems will 'bleed' sap.
Next year