There are absolutely some books worth reading that don't require a ton of revision! Games of Divinity, for instance, is basically ALL well written, and gives you an excellent overview of the gods and metaphysics of the setting. Plus, it's from 1e so it's cheap, despite being still relevant. Compass of Celestial Directions: Malfeas may have flaws, but it should still give you ideas as to what Hell is like. Compass of Terrestrial Directions: The North is (IMO) the best of the ground-level books, focusing on the temperate-to-frozen north of Creation. The Glories to the Most High books fill you in on what the Incarnae are like, and why they act the way they do. The Caste and Aspect books give insight to what it's like to be exalted, looking at the Solar and Terrestrial castes and aspectsI don't refuse to read them, just to own them. If it's as bad as I've heard, though, the very minimum would be going through with a sharpie.
With sufficient politics - forging alliances, conquering those who will not bend knee, cutting deals with those you find distasteful, and so on - you could find yourself King of the World. It would be a feat not matched since the end of the Primordial War, and would require you to defeat or slay hundreds of others, many with as much potential as you, but it's technically possible. But not forever, and likely only briefly.Nevertheless, it's possible for one person to take over the world, even without frankly absurd amounts of luck.
Every Exalt is, to some degree, a flawed and maddened paragon of virtue. You cannot always be a good king, for EVERY exalt is broken inside, and this means you WILL sometimes make poor decisions, leading others to doubt you. You cannot fully trust your Exalted allies, for they are broken inside, and may make poor decisions and betray you. You cannot fully control your lessers, for every and any Exalt can learn to shed mind control. And when bad luck comes together - when you reach your limit and snap and your allies decide to stop you, or when they snap and decide to overthrow you - the mighty shall be overthrown by their inferiors, as has happened again and again through the history of Creation