*I'm not a WP expert so try this at your own risk.
To customize the look and feel you need to mess around with the files in your theme folder
/wp-content/themes/yourtheme/files
It would be a good idea to read the docs at
http://wordpress.org to understand how it works. I know a little php and it was fairly intuitive for me. But even if you don't know PHP the docs are pretty good.
As to posting in the future: when you make a post look for a little box on the right site that says "Post Timestamp" and set it for the future. You will probably want to install a plugin called "smart pinger" because I think the default pinger will ping when you create a post and not when it is actually published.
Hope that helps