You could try one of the many LAMP guides on HowToForge
. For a simple publicly-viewable webpage, there's actually not that much configuration involved (mostly just install stuff using yum, turn on httpd, upload some files, and go; if you need MySQL there are a few more steps to make sure that's secure).
If you want to start editing Apache's config files, the official Apache documentation is probably as good as any(http://httpd.apache.org/docs/
), though many of the configuration options are Greek to those who don't have a decent grasp of the HTTP protocol itself...