Hops seeds are difficult to sprout and it's a gamble as to what you'll get from them, not only in terms of male/female plants but also in terms of genetics.
You'd be better off with rhizomes which genetically clone the original plant.
Purchasing hop seeds over the internet is generally a scandalous operation (i.e. rip-off). Rhizomes are probably pretty safe, however, I'm not sure of the regulations governing international shipment of plants.
Also, most interesting varieties are patented, valuable property and the only way you're going to get a copy of them is to jump over the fence of the hop yard, cut and dig a rhizome and jump back without getting caught.
Not sure of the climate in Spain but most hops require a more moderate climate like the Pacific Northwest, Upper Midwest and Northeast US.