You have basically set everything up already. To access your wweb server just open a browser and type in the address bar http://localhost A web page should pop up saying it works!
All of the web page files are located in /var/www. You can just copy your web pages to that location, or the way I do it is to create all the files in my home directory and just create a sym-link to them in /var/www eg:
Them to access the page you would enter in your browser http://localhost/web_pages
jimk@intrepid:/var/www$ ln -s /home/jimk/web_pages web_pages