What’s the benefit of employing various aliases, email accounts, and browsers to navigate the web on the same computer, when your IP address stays constant across all sites and is tracked and correlated by Google on the majority of them?
If you’re trying to not be tracked you need to protect your IP. There’s a lot more but that’s the basic first step
It depends on your threat model. If you’re concerned with smaller services getting a strong handle on your identity (e.g. a porn site knowing your actual name), then leaking your IP address may not be a problem.
If you’re worried about your online actions being traced back to you by Google then using a VPN to limit your exposure may help.
If you’re worried about three letter agencies, I’d assume that most VPNs are compromised and try to avoid doing anything online.
Just use a VPN and avoid always using the same server?