2. Wait and find out how difficult it is to civilize not-Japan, then possibly take the reigns of Persia.
Civilizing Persia is'nt that hard in Victoria I, given their's a pretty forward event chain, so I'd assume the same event chain will be carried to Victoria II.
Will you be able to start the game at any dat you want, like in EU3 and EU:R?
You'll have to be more clear with your question.