Protonmail and Tutanota are perfectly viable email alternatives, Libretube/NewPipe and Invidious can replace Youtube on Android and Freetube can replace it on your computer (and you don’t need an account for any of them), Aurora Store with an anonymous login can let you update your apps, or if you don’t want to rely on them, you can easily download the latest updates from APKMirror, and there are million open source alternatives to Play Store apps available on F-Droid.
you don’t need them tbh
Protonmail and Tutanota are perfectly viable email alternatives, Libretube/NewPipe and Invidious can replace Youtube on Android and Freetube can replace it on your computer (and you don’t need an account for any of them), Aurora Store with an anonymous login can let you update your apps, or if you don’t want to rely on them, you can easily download the latest updates from APKMirror, and there are million open source alternatives to Play Store apps available on F-Droid.