You actually don’t need a Youtube Account, unless you are a paying subscriber to some creators!
Check out FreeTube, it’s a desktop app similar to NewPipe on Android, that allows you to subscribe to creators while still not requiring an account, and without ads.
As for Android, I don’t know what phone you have, but if you’re ever buying a new one, I highly recommend just getting a (paradoxically) Google Pixel and installing GrapheneOS. An older Pixel is OK, just check which versions are still supported and for how long on the Graphene website. And the installation is super easy, and can actually be done in a browser without any issues, and takes like 15 minutes.
I’ve recently switched to Graphene and it’s amazing. I have a separate profile for apps that refuse to work without Google Services, so they are contained, and additionally Graphene sandboxes the google play services, so they can’t do anything you won’t let them, in contrast to any other Android phone where Google Services can basically do whatever they want without any way to limit it.
I also run Mullvad VPN on my phone all the time, but I don’t think that it’s neccessary.