I have a openvpn server that I don 't push all my trafic through the server. In windows, android (coonecting through Openvpn Client), and when I am connecting from opensuse terminal with the command
You describe manual ways of initiating an OpenVPN connection to your server.
But, you don’t really describe well what you mean by “internet data,” are you saying that you don’t want your Internet connections to go through your OpenVPN connection?
Are you asking about setting up a Split Tunnel where your LAN traffic can be routed through the VPN but when you connect to Internet sites, you instead route through your regular Default Gateway?
I doubt that using Network Manager makes any difference except that you typically set up your VPN automatically when your machine first sets up networking but that may not be what you want.