You can get lots of materials in online. for redhat you can check in

http://docs.openstack.org/admin-guide/index.html (http://docs.openstack.org/admin-guide...)

Then you can start installing openstack in your infrastructure. There are videos on youtube as well showing step by step procedure to install openstack. I followed the below one

https://www.youtube.com/watch?v=eOlIB323c8s (https://www.youtube.com/watch?v=eOlIB...)

then you can start learning one by one. If you need more info please ask specific question. I will be glad if i can help you.

For beginners, either you can try installing openstack using devstack(ubuntu) or packstack(centos,RHEL, fedora).

Below may be some help for you.

http://docs.openstack.org/developer/devstack/guides/single-machine.html (http://docs.openstack.org/developer/d...)

https://www.rdoproject.org/install/quickstart/ (https://www.rdoproject.org/install/qu...)