You don't have to pay anyone. I think you're smart enough to manage this on your own. But i think you are a first time Linux user ? Am i right ?
If you use CentOS - which i never installed or used in anyway - your Distro is RPM based. So far as i know there is no apt-get in RPM based Distros. Right ?
Please answer this questions.
Do you know how to handle files with the filemanager or terminal ?
Install packages from your Distro ? Using rpm - Installing packages
You have installed the Client but not the OpenVPN package ? Look at the very last chapter "Install Files on Client"
Try this. If it still don't work pm me for IRC help. Maybe i can help.