Linux is just a kernel, it is the base of the kernel in Android and the kernel that runs the web (even on Microsoft servers they use it in a significant share alongside Windows).
We have seen in France some criminalization of installing alternative OS to judge people bringing “installing Linux” as evidence but this is ridiculus. IN the same time some cities are switching from Microsoft to FOSS and thus Linux.
I don’t understand why you should be scared of switching beside loosing some compatibility with some software and changing your workflow and habits slightly.
Install GrapheneOS (consider this device as insecure as Google dropped support) and some minimalist launcher such as Olauncher, Unlauncher or mLauncher through Droid-ify (or another F-Droid client of your choice) or directly from source. You can also install digital wellbeing apps such as Mindful, DigiPaws, GreaseMilkyWay or Regain (that last one is proprietary and is available on PlayStore (or AuroraStore)) to help you have better control over app such as YouTube.
For YouTube you can also install some FOSS client such as NewPipe, Tubular or PipePipe etc…