Putting aside past differences for a moment...
HG, you cannot start on XIII. I can say already that it will not do justice to the series due to the amount of changes etc that have been made.
Download an emulator, find a website that has the PlayStation releases and at least start those first. It's a crime to let your first Final Fantasy be the next-gen release.
(My first was IX, I recommend it highly)
well I already have a PSX emulator. And the PS1 games are extinct and are not for sale in any store near or faraway from me. And I don't think its legal to download.