Writing for Sesame Street/Other Children’s Shows

Hey all!

So, I've always loved writing. Have dabbled with children's books and am a songwriter of all genres with some slight semi-major success as a ghostwriter. As a kid, I always loved Sesame Street and The Muppets, but I was wondering how one goes and gets their head in the door to write for these types of shows? College/courses? I'm totally new, just trying to see what the options are/process is!

Thanks!