Summer raspberries fruit in the summer on last years growth.
Autumn raspberries fruit in the autumn on this years growth, but will also fruit in the summer on last years growth if it was not cut down.
Sounds like you have autumn ones, although you should have had a crop in the first year, but you do not say when you got them, but I am assuming it was too late to get a crop for that year.
If they are autumn you should get a good crop off this years growth in the autumn.
Pruning is simple, come the winter just cut the whole lot done close to the ground.