You may also use a binary version, it doesn’t require virtualization. However, if this is Windows, then you have only option to use Win GUI Storj Node Toolbox
You cannot setup the port forwarding using only OpenVPN client and any VPN provider, you should also have a server with public IP and OpenVPN server installed and configured, or use VPN providers with port forwarding feature such as portmap.io, ngrok, PIA, AirVPN, PureVPN, etc. Renting a server for OpenVPN server with good bandwidth may not be covered by your income, so I do not know is it worth it.