As for the creation of the world just start with the planet. Do you not find it astounding that earth is different than all other planets created just for us to inhabit? No other planet is like ours and that shows obvious to me God created it just for us.
First, we don't know that "earth is different than all other planets," since we haven't been to all other planets. There are bajillions of them, you realize? There are almost certainly others like Earth out there. Whether any of them have life remains to be seen.
More important, though, is the fact that, just because the Earth is habitable to us, this in no means proves (or even implies) it was "created just for us." If - and you have to bear with me on this, but if - all life on Earth evolved, then it stands to reason that it would evolve to be adapted to the environment it evolved in. We breathe our particular mix of nitrogen/oxygen/etc. because we evolved on a planet with this particular mix of nitrogen/oxygen/etc. for us to adapt to breathing. We drink water because we evolved on a planet with plenty of water for us to adapt to drinking. We are able to digest the particular foods we do because we evolved on a planet with these particular foods available for us to adapt to digesting. Evolution by its very definition is the process of organisms adapting over time to their environments. So we (and everything else alive on Earth) adapted over time to the environment we evolved in, which happened to be Earth.
On your "perfectly created just for us" planet, how do you explain the toxins that are here? Foods that are poisonous to us? If everything was designed and created "just for us," why are these foods even here? It should be that if it tastes good and we want to eat it, then it's good for us. Why doesn't everything that's good for us taste wonderful? If I were creating a wonderful world for my minions, I would at least make turnips taste like ice cream for them! It's only fair.
Why are there creatures that can kill us here? Why are there plagues? Why are there places too cold for us to survive? Why are there deserts where we will die of thirst and heat? (Of course, there are other creatures that can live in all of those places, because they've...gasp!...evolved to be adapted to those environments.)
You've got it backwards, kathy. Earth isn't perfect for us because it was designed for us. Earth is perfect for us because we evolved on it, adapting to it so that we fit what it has to offer. If you really, truly look at it this way, you'll see it's really a much better explanation. It fits the facts much more reasonably. It just doesn't fit into your stubbornly pre-conceived notions of your god and your fairy-tale book.