how to make things happen that would interest anyone in a world i wouldn't want to kill myself if i had to live in.

and that's the trouble with most game and action media worlds, or how i feel about them.

my worlds are all about, no holds barred, no dramatic considerations prioritized, ones i would actually WANT to live in.

but i do understand, "don't tell; show"

and that's what i'm interested in doing,

with 3d animation, and every other kind of art i can get my little grey cells to wrap themselves around.

and invite and attract exploratory participation, (and not just trolls) to them.

of course they must be robust enough to gobble up trolls and make them disappear into the wilderness where they wander around disoriented and starve.

I tend to start with background - what's the map, what if any are the physics differences between that world and our own. Then get a broad overview of the political geography, then establish what the Problem is that the heroes must deal with. If you think about things as you put them together, you can usually come up with a world that isn't totally horrible to live in if you want. My Beryl from Blood of Dragons is basically Terran, with psionic-based magic added, mostly post-feudal politics long after an Apocalypse. But that's the order in which I put the background together.

That's a tricky question I'm afraid. But here would be my thoughts on it. It's very tough though when you make settings for yourself and try to give them a broader audience. I used to make all kinds of settings just for me, but there wasn't any sort of meaningful conflict in them, nor was there really a focus on entertaining others in them and naturally people didn't really find the appeal. Eventually I had to revamp those settings and gear them towards people being able to find 'adventure' in them rather than just simulating a world I found to be pleasant.

However, you don't necessarily need to do that, but it's a good idea to look at what people would be able to do in your world and work based off of those appeals. While it's true that most people prefer settings with action caused by character tension, usually physical resistance. It's possible to create worlds that entertain in other ways, such as creating a sense of awe from locations and 'wondrous sites' or focusing on character drama, or to pursue more lighthearted and constructive pursuits, such as building a home, helping a town become successful and pleasant, find love, etc.