What does Tor over VPN do?
Connecting to a VPN first, then Tor (also known as “Tor over VPN” or “Onion over VPN”) gets you all the privacy protection of the Tor network, plus added protection that prevents any Tor node from seeing your home IP address.
Should Tor be used with a VPN?
A VPN isn't a requirement to use Tor, but it helps a lot. It encrypts your whole traffic, masking it from the ISP. In short, it's much safer to use Tor with a VPN. Not all VPNs offer Tor features in their product.
How to configure Tor over VPN?
Here's how to use Tor with a VPN:
Open the VPN app and connect to any server. You may want to select a server close to your real location for better speeds but any server will protect your privacy. Once your VPN is connected launch Tor Browser. That's it!