1) Get an email with a custom domain that you own, so you can switch providers without losing your address. Use Google takeout (
https://takeout.google.com) to download your old messages.
2) Use a third-party password manager, or if you're paranoid (like me) use one that is open source and can be self-hosted like pass (https://passwordstore.org)
3) Use Linux on desktop for the best experience if you're a tech/software person. If not, you're stuck with Microsoft Windows, which nowadays is a window into your personal life and data. FWIW, the new M1 Macbooks offer the best value than any other laptop on the market today.
4) Use iPhone. Whatever you might think about their desktop hardware, the iPhone at least is price competitive with high-end Android devices. The biggest hurdle is transitioning to a different OS, but that difficulty is usually overestimated.
If you're really attached to Android though, the best you can do is use a custom ROM like LineageOS (aka Cyanogenmod), or maybe get a Purism phone (https://puri.sm/) which doesn't use Android at all.
5) Switch to Firefox if you're not already using it. Mozilla's hands aren't exactly clean, but they're a massive step up from Google in terms of privacy.
For all other Google services, you can easily find hundreds of alternatives, including self-hosted ones. Here's one list I found with a quick search (on DuckDuckGo!): https://restoreprivacy.com/google-alternatives/
The only Google service I find myself using nowadays is Youtube, and AFAIK there's not much you can do to avoid that one.