flag meant to be based off the Australian/New Zealand/American flags? No; this is completely a self-made project.
without a military? The mere fact that we have an entire factbook on it & its equipment is already a definitive no.
based off Canada/Australia/the US? While some inspiration may be inadvertently taken from those countries, the answer is no.
use NS stats? For the time being, the answer will be no, until I have a page describing which specific stats are canon - the following are certainly not: tax, defence, employment, policies, population, incomes & industry.
the name of the capital? Despite what some may believe, it is not named after the Melbourne suburb with the same name; it is actually an anglicisation of the river that passes through the city centre, of which it is situated at its mouth (hence, foot).