Atmosphere Sky and Shadow questions

Vially

Okay so trying to do an outdoor Image and run across a few issues, I'm sure they have been reviewed and answered, but searching I find very little information.

So I created a distance light, and called it the sun. In the atmosphere render settings I have it as the SS Sun Node. I am playing around with light properties, glow intensity and etcetera, but for the life of me I cannot get the type of shadow lines one would expect in real life. If you look in the image the shadow that crosses the road in the foreground is cast from a building across the street, this is great and good, Except...

The outside edges should be much sharper similar to those for the girl.

where the shadow ends, (just past the curb,) the shadow just blurs out and vanishes. This should be a straight across line, it is a hard straight edge, cast from the top of said building across the street.

So,

1. How do I get these shadows to be harder edged while maintaining the intensity of the sun "light"?
2. How do I darken the shadows? The concept of the image is the sun coming up and shadows being pushed back, hard to do if the shadows are not dark.
3. How do I get some cloud textures into the sky? There are no parameters under atmosphere to do anything with the sky. I do not see where I can even change the color to try and make it blue again.

Anyway, I'll probably have more questions as I go, but resolving these will help. Even a good tutorial would help, seems to be what is required for this application :) 90 hours of tutorials so you can spend 10 minutes trying to create an image. It's getting easier, slowly, but it is getting there.