If you can't download music through Apple Music, download it with the help of a converter from Youtube to MP3 from this site https://www.flvto.biz/youtube-to-mp3/. These services come in hand in this situation and not only. They are free to use and that's their main feature. I never spent one cent on music, I always used these converters for both Android and iOS. This might be unfair for the music creators but damn, we all try to cut our expenses somehow.