Hello Joseluisporras,
Thank you for using Apple Support Communities.
I understand you are are having issues adding songs to your library. Without specific information on exactly what is going on, I can point you to this support article that addresses adding content to your library.
Add and download music, shows, and movies from the Apple Music catalog
If this doesn't answer your question, please get back with us and we can go from there to resolve your issue.
Best regards.
Thank you for using Apple Support Communities.
I understand you are are having issues adding songs to your library. Without specific information on exactly what is going on, I can point you to this support article that addresses adding content to your library.
Add and download music, shows, and movies from the Apple Music catalog
If this doesn't answer your question, please get back with us and we can go from there to resolve your issue.
Best regards.