http://karoshi.linuxgfx.co.uk/Karoshi is a free download with no licenses or anything to pay
(If it was a windows 2008 server you could pay £1700
).
It is set up for schools, But can be used for an office or your own web site (which I'm looking into
)
You download it.
Burn an 'image' to a disk .
Run that as a live CD/DVD.
Install to hard disk.
Choose which type of server to install (there is a diagram of the various types).
Have fun.