You can use either but using both is the best idea.
First download and install a VPN app, connect it and open the tor browser to surf the web.
This process is making your identity more anonymous. Continue safe surfing. Here is a great read that explains the differences and integration between tor and VPN:
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It depends largely on your threat model which is best. For example, some may want to hide the use of Tor from their ISP, so use Tor inside a tunnel.
There are a couple of good articles about this here:
https://www.ivpn.net/privacy-guides/why-use-tor-with-a-vpn-service
https://www.ivpn.net/privacy-guides/advanced-privacy-and-anonymity-part-8
First download and install a VPN app, connect it and open the tor browser to surf the web.
This process is making your identity more anonymous. Continue safe surfing.
Here is a great read that explains the differences and integration between tor and VPN: