Oh, @UniformMom it’s hard not to second guess yourself, isn’t it? That’s a tough situation. I know some students do a gap year to work on their music between HS and college. Is that something your S would consider if he isn’t happy with his choices?
If not, I’m sure he can still thrive at the state school and a full ride is most definitely a wonderful thing that will give him a lot of post-graduation flexibility!