Hmmmm…
OK…first, the “Hands Off” approach:
I would start with the creation of Natural Laws. Then let everything take off from there. See what happens (I would build in a bit of Divine Randomness, so even I, in my Divine Knowledge don’t know for certain how things will turn out…hey, I’m God, I can do that).
If I get bored, I may tweak things a bit. Sooner or later, sentience is bound to “evolve” (I’m God…I can wait).
When it does, I will lay down the Law. Basically, be good to one another, or I shall be Wroth. I would demonstrate my Divine Wrath, just to make sure they get the point (blow up a volcano or something, but I’m not the type for “object lessons” - until someone screws up, they’re safe). I will have one, and only one, Divine Scribe to write everything down. Make sure he (or she) gets the point that a) no fancy prose. Write what I say, as I say it, dammit. And b) no interpretation. If something doesn’t make sense to his (or her) non-Divine mind, let me know, and I’ll clarify.
I may allow for an afterlife, but I’m not going to clue anyone in on it. Live your life. If you screw it up, you get to face the consequences then and there, not when you die. If it’s an affront to Man, other humans can decide what to do about it. If it’s an affront to Me, I’ll handle it.
No Hell. “Lucifer” has no power. I gave him a job, and he blew it. He’s been fired - he doesn’t get his own realm with power equivalent to my own. If he begged, I’d make him human. If not, he gets Oblivion.
Natural disasters I’d still allow. If nothing else, they provide good motivation for the humans to figure things out. If you build your huts on a flood plain, and a subsequent flood wipes out several hundred people, learn from it: don’t build your huts on a flood plain, fercryinoutloud! If a volcano wipes out your village, don’t build it at the base of a volcano. C’mon people, THINK! It’s probably harsh, but I’d also make it clear that I’m not doing it. Sure, I could change things, but what would they learn if I did? I would also make sure everyone knew this was how I felt about it. And no, whining isn’t going to help. It may just incur my Divine Wrath…
I would certainly make my existence known to everyone. If you don’t believe, fine. You’d have to be a moron, but whatever.