Help installing a e-commerce store on my Website

I need help installing the magento E-Commerce platform on my website. ## Deliverables I am trying to install the Magneto E-Commerce software on my website and have been unsuccessful. So far what I have done is upload all the files via FTP and set the permissions on the required folder to 777. I also created a MySQL database and username/password. After doing all of this, I should be able to go to the magento directory with my web browser and start the installation wizard. Instead, I get this error: # Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, webmaster@[login to view URL] and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. I need help getting past this error and finishing the software install. I don't think this should be a difficult job for a tech savvy person. I do not require anything be done outside of what is necessary for this software to be installed on my website. Magento User Guide: [login to view URL] My Web Host [login to view URL]