As much as I hate to be "that guy", it might be better to get some exprience roleplaying on this site before jumping into trying to GM your own RP. I know you have exprience on other sites but trying to use that exprience alone on a different site is a pretty shortsighted belief, and one that's pretty common. Your hook is really, really weak since what you have is pretty much the baseline for all NRPs here. Plus you're so new that people are less likely to jump on your idea since you are more or less completely unknown and the NRP community on this site at least is pretty close/small (or even insular).

Also as what Yam said, having an RP where people are competing with each other instead of cooperating on an out of character/meta sense does not lead to good out comes most of the time. Once people see their nation as part of themselves and not as an independent creation, that is when you get a lot of arguing, people trying to push the limits and boundaries. Overall its not a healthy mindset for an RP.

Again, I am not saying to turn my nose up and be an elitist snob, I'm just being blunt since this kind of situation has happened a lot and it always ends with the new person asking why aren't people as passionate as they are about their idea or RPing and just leave.