Photo Nexus Theme HELP: A few basic questions for you pros out there!

So I am trying to create a photography website. I purchased a domain name and hosting through bluehost.com and purchased/downloaded the WordPress Photo Nexus theme. I have installed it and have begun to customize it.
Immediately I ran into some trouble… First my website domain is http://www.stwilsonphotography.com and it shows up blank despite having already created a “page” with 16 photo on it that is visible from its own individual link: http://www.stwilsonphotography.com/paris-en-hiver
1) How do I make the “lost” link with photos attached become available to click on from my main domain?
2) How to I create more categories on the left/right side of my domain? (i.e., “portraits” or “black and white”) ?
3) When viewing the automated slideshow of images, there is a (||) pause symbol that appears on the top of my image and stays there for the first 3-4 images. How do I get that to disappear? It’s incredibly distracting and detracts from the images.
4) On my main domain, there is a huge block that says “PHOTO NEXUS”. How do I get rid of that and display my own website title there?

Thanks!