What picture?
You don't want to use a commercial VPN's central server, or you don't want your setup to have a central server?
Explain what you want your VPN to do (e.g. connect two PCs together, or route all network/Internet traffic via a VPS) and maybe someone can help.
The OpenVPN manuals are very informative and could be all you need to get what you want done on your own. I suggest having a read of them, give it a go yourself and come back if you run into issues.
https://openvpn.net/index.php/open-source/documentation/howto.html
https://openvpn.net/index.php/open-source/documentation/manuals.html
