For everyone without a AdGuard subscription who wants to watch YouTube without ads and without integrated sponsor bullshit on the TV I'd recommend SmartTube. Don't forget to remap your YouTube button on the chromecast remote to SmartTube.
I'm paying YouTube Premium but still use SmartTube on the TV because of its integrated Sponsorblock.
I set up Radicale with the normal deb package, I like that more because it will be automatically updated.