there are several tutorials on how to setup a website in Webmin:

If you cant setup a website via Webmin, i recommend you to try free control panels like zPanel (very easy to work with) or Kloxo control panel. Kloxo, zpanel, Webmin are available and installed on ICPH VPS.

To see how Kloxo or zPanel looks like, google:
Kloxo how to add domain
Zpanel how to add domain

I think Kloxo is more reliable, but zPanel is easier to learn and work with.

Thank you