Earlier quoted context omitted.
> I haven't even needed to sign up for a Google account since using it (although I have to use an alternative app store). This means you can't use any Google apps like Maps, Photos, etc, right? What Google alternatives do you use?
Yup. I try to use as little Google as possible. Maps does work without an account, and is preinstalled, so I can use it if I want. But I try to use duckduckgo maps as much as possible. Photos works just fine without an account too.
Downsides are that they don't contain such a wealth of place info as Google Maps does, and surely do some tracking too (from which you should be able to opt out thanks to GDPR).