I was listening to a podcast just today about hop growing from a 4th gen hop grower from the yakimah valley. He said they cut back the first few as they consume the stored carbs (I don't get it but......). Anyway, after the rest he said was more or less give wide spectrum fertilizer, let it dry out a little between watering (although he said others water every day), and make love to it. I added in the last thing. He also mentioned being planted an inch or so deep is fine and to put compost on it once the bines have grown a little.
The other reason he said to limit the bines was because their machines couldn't handle the excessive foliage.(he limited to around 7 bines I think.)
Basically-water well, give them something to climb on and fertilise regularly. That is all.