The easiest way to install Moodle without having to delve into the httpd configuration too much is to install it under the default web directory
/var/www/html
so that would make
$CFG->dirroot="/var/www/html/moodle";
$CFG->wwwroot="http://myhost.mydomain/moodle
.assuming of course that you have a standard RedHat install for Apache/PHP etc and that you are running a reasonably new version of RedHat as these paths have a habit of changing.
Something is going on though! Your home page redirects to the moodle page - is that intentional. You might want to switch all this stuff off until its working properly