Once you've enabled the skill, say "Alexa, play Radio Baha’i", then follow the prompts from there.
You can also say "Alexa, ask Radio Baha’i..." "...to listen live."
While listening to the live stream, you can hear the current song details by saying "Alexa, ask Radio Baha’i..." "...what's playing?" "...what song is this?" "...who is the artist?"
For instructions on interacting with this skill, just say "help."