A browser like Tor coupled with a good paid VPN is probably your best bet. I would suggest having a VPN running before ever downloading Tor Browser in the first place. The more people onboard with Tor the less likely any one person will be singled out for downloading/using it.

Duckduckgo is okay, but using it inside the chrome browser probably still gives google what they're after.

Theres an interesting addon called AdNauseam which blindly clicks on all ads in the background essentially disguising your actual preferences (currently disabled in chrome)

Your computer (microsoft) and mobile device (android) are probably logging everything silently in the background before any attempts to disguise your amazon shopping cart. Aside from abstaining from the conveniences that modern devices provide i think we're stuck clicking "allow" and "agree" to their terms of service.