@mud1m
You don't need a skill~ You use TuneIn radio or IHeart radio which is an Alexa feature in every device. If you don't know this, then you need to read the basicS of your device from Amazon website.
So, this is how it is used, you say "Alexa, play KOOL FM from tunein". I just did it and it started playing. So, now figure out what to say for other stations. Sometimes you need to say the call letters, or, like KOOl, a nickname.