Zend certified PHP/Magento developer

VPN through VPS

I don’t know much about networking and routing, but I’ve recently set up a VPS linux server to be my personal openconnect/anyconnect VPN so that all my traffic goes through the linux VPS. Is it possible to connect to a commercial VPN on my VPS and route all the traffic through it?!
What I want to do is that I want to connect to my VPS using openconnect/anyconnect and have the VPS routing my traffic through the commercial VPN as if I’m connected to the VPN using its official app.
Any help is much appreciated, but please try to be as thorough as possible. Thanks!