The way I see it, you're falling into some traps. Not in your comic, but mentally.
You seem to be, as TV Tropes would put it, writing by the seat of your pants.
This is not the trap in itself. It works for some authors. No, when you say that you need some form of inspiration to know the direction of your story, that's the real trap.
We all get writer's block. Writing is work. It's tough sometimes. But waiting for inspiration is the greatest trap, because it makes you don't even start. And you have to start.
Many working writers talk about it. They don't wait for inspiration. They sit and write their way through it. They start and then they wait for inspiration to set in.
So don't stop, friend. Don't wait for something as abstract and, really, elusive as ''inspiration''.
Now, maybe it would help for you to plan a little ahead. To plot the next months of your story. Just from this topic, you can see you have the idea for the world. To know what happens in the story is one step further. Jenny herself thought a bunch of stuff just reading it. It's easier said than done, but think of it: is the pressure you put in yourself stopping you from having ideas?
Because you got them! The concept is cool from the go. There are things to explore, paths to take.
Sit down, face the white page, make a plan, follow everyone's advice here (Will gave a super solid one), and start. Do it! Shia LeBouf style DO IT! Don't wait for inspiration, find your way to it.