[pomatic]

You are in Spain but you haven't said where? If you are in, or near, Barcelona try to get involved in the local te h scene. There are some great EU funded incubators who would help cover all the parts of the business you don't already have expertise in, and also have a vested interest in raising your (marketing) profile.

18 months is optimistic in terms of runway. Try to raise the same again in angel/friends & family funding. It's much easier to do that now, at the beginning, than it is later on, when suddenly everything seems bleak. Very best of luck, P.