All your actions have real-world consequences. People can revolt against you any time, and there are several governments in exile that might be wanting their autonomy back. The only super-natural part of this hypothetical is that you spontaneously seized power overnight.
Immediately use my new-found power to restore the sovereignty of every nation, with the exception of Belgium. I want 20 million dollars from them first, and if they refuse I'll split their tiny nation between the French and the Dutch.
Chance are I'll get my $20 million, and live longer and happier than anyone else would in that situation.