I ended up getting a pound of hops from my two Cascade plants, dried them on a screen in the garage, vacuum packed and froze them. So far i have used them with great results in two beers. I only got 1 oz from my two Magnum plants.
So I do not believe that your first year hops will necessarily be unusable. Depends on how you take care of the plants and when you harvest. I guess it also depends on climate and whether you chose the right plant for where you are located.