My suggestion would be for you to take a step back and think what that acomplishes. Browser fingerprinting makes your browsing pseudonymous at most. So switching VPNs will likely just make the service provider and the tracking websties know that you have multiple VPNs and which ones they are.
Also see:
What about privacy in non-Whonix qubes?
The main way Qubes OS provides privacy is via its integration with Whonix. Qubes OS does not claim to provide special privacy (as opposed to security) properties in non-Whonix qubes. This includes disposables.
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