Judging from the models, you got a nice start qua organic modeling
But from my pov, all good projects start with proper documentation and reference to oneself's capacities thus my question is, did you already set up a document to have a proper view about the entire project. To put it simple, it all starts on paper
Once all ideas have been elaborated, the development stage can begin.

I'm not saying you're on the wrong way, I'm indicating that if you want to see your project grow big, you need to know first what you're capable of before starting the develoment stage.

Thanks in progress

Frazzle