This is what I'm attempting to do with the help from DebianHelp.co.uk, so my file looks like this. Does it look right for the default file? Or do I need to keep the current default and put this info in at the end?

Name-Based Virtual Hosts
With name-based virtual hosts, one instance of Apache hosts several domains. You do not need to set up multiple IPs for a machine. This is the easiest, preferred alternative. Reasons against the use of name-based virtual hosts are covered in the Apache documentation.

Configure it directly by way of the configuration file /etc/apache2/ sites-available/filename(by default we have default name file take this as reference and create new file). To activate name-based virtual hosts, specify a suitable directive. NameVirtualHost *. * is sufficient to prompt Apache to accept all incoming requests. Subsequently, configure the individual hosts: 

 
NameVirtualHost *. *
<VirtualHost *>
    ServerName www.example.com
    DocumentRoot /home/www/htdocs/example.com
    ServerAdmin webmaster@example.com
    ErrorLog /var/log/apache2/www.example.com-error_log
    CustomLog /var/log/apache2/www.example.com-access_log common
</VirtualHost>
 
<VirtualHost *>
    ServerName www.myothercompany.com
    DocumentRoot /home/www/htdocs/myothercompany.com
    ServerAdmin webmaster@myothercompany.com
    ErrorLog /var/log/apache2/www.myothercompany.com-error_log
    CustomLog /var/log/apache2/www.myothercompany.com-access_log common
 </VirtualHost>