Oh I am, I am. Problem is, if things go right and it ends up being successful, it'll span towards a bit more than a dozen volumes just to finish the entire plot.
Take it from a debuting author - this will happen. You write something, scribble out a little fantasy that's been stewing in the mind's void. But then comes the logic. The questions of who what, when, where, why, and of course How are demanded. The reader's curiosities have been piqued, but now one has show the end of the rabbit hole, one that will actually lead them out, so to find another.