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Furthering this, I would use "Duo". It's such a better MFA app. It has lots of better usability features, and should you want they just added iOS back up.

By having just your one Gmail account you are making yourself vulnerable. Google does allow up to 99 character passwords, but still your laptop might be left open and things like that.

I would suggest starting to use email aliases such as those offered by 33mail or Blur which forward to Gmail. Basically instead of using the same username everywhere you now have say 10 or 20 usernames. A lot of people forget that usernames can be as effective as passwords, they in a sense are credentials to.

Also read any of the books by Michael Bazzell.

Also also going all the way here I would get a VPN service for your phone. Then I would go to FladhRouters.com and order a DD-WRT router and embed that VPN (easy to do) in the router, or even better another VPN service.