First, philosophy: this article resonated so much with me that I made the brave step of deleting my big tech accounts and switching to Linux: https://medium.com/hackernoon/leaving-apple-and-google-my-ee...
Then, execution. This site will help you to find user-friendly alternatives to your spyware apps/OSs/services: https://www.privacytools.io/
I am now with a setup that maximizes privacy and giving money to ethical companies: Phone OS: LineageOS and /e/ Desktop/Laptop: Debian and Linux Mint Browser Mobile: Bromite Browser Desktop: LibreWolf (firefox fork oriented to privacy) Maps and GPS mobile: OsmAnd Mobile app store: F-Droid, Aurora Store Search Engine: DuckduckGo, SearX Email: Posteo (1€/month) VPN: Mullvad (5€/month) Online drive: NextCloud-based service ie /e/ foundation
Once I researched the above and checked the companies/projects are trustworthy, I started using them with surprisingly low bumps in the road. For mobile OS I went radical and didn't even install microG (a package to enable G services so some apps work well). I still can use my favorite apps, including banking (although if you root your phone you might have issues)