You can probably whip up a token like this quite easily.
I'd say that the technology side isn't that bad, but what you do need to think about is both the tokenomics and the government side of things.
E.g. how are you going to ensure that the token will retain its value when the actual fiat is worthless? And how are you sure that this will be propagated and massively adopted within Ukraine when so many things are happening at once?
First and foremost, we need to know how legit things are here? Is the OP telling truthful things or just wanna ride the hype surrounding this war? He should give us reliable links but til then, he can always collaborate with right people within his community. He can ask for expertise of his friends, colleagues or family that can help him on this endeavor. But if he will just create another token dedicating to the Ukranian currency without solid backing, I don't think this will go somewhere.