Firefox Multi-Containers addon can help you with that, sandboxing different instances of Google. And you can even route each container through a different VPN server if you subcribe to Mozilla VPN or do extra legwork with Mullvad VPN, so that they can't fingerprint you with your IP address, browser, and machine, even if you have a separate set of cookies for each container.
"I've got nothing to hide" is not a good enough reason to give up privacy. "Watch out for terrorists" is not a good enough reason either. These days, "Think about our children" seems to be the argument of choice to encourage people to voluntarily give up their privacy.