The hero is now gone, but I'm still here, now what? (Undergoing editing)

What would you do when you find yourself waking up as one of the heroines a JRPG that you used to obsessively play? What if you know almost everything about it and are confident that you can be strong no matter what? What if you know the idenitity of the Hero and know the places of his powerups? What would you do then? Go out and explore the world? There are Demons rampaging across it. Help the people? They’re not struggling, not really, in fact, it can even be argued that they’re thriving. Then?.. What about making such a big mistake that it ended up killing the prophesized Hero, but… everything continued even with his death, there are no resets, not here- the world is still there, the Kingdoms are still standing, and now a Demon Horde is about to descend onto them. Well, now what?