nts.live internet radio from London

Yes because there is no need to setup another VPN. You only configure the DNS settings (Private DNS). I know that Mullvad on PC has an option to use custom DNS server

There’s always nextdns.io that can be configured to use ad blocking filters on the dns level. You can set it up on your phone as well

Busuu is much better. It feels like it actually tries to teach you the language in an efficient way, instead of teaching you useless phrases like “my owl never paints” and waisting your time