First look at https://na.finalfantasyxiv.com/lodestone/worldstatus/

If the world is any status other than Congested, then sometimes making a character at odd hours works.

If the world is Congested (which Coeurl is), then you cannot make new characters on it period, nor transfer to it.

The only way to play on Coeurl right now is make the character on a different world and world visit to it. They can make a character on Coeurl at some future date when Congested status is removed at one of the patches, but we don't know how many weeks or months that will be. It could even be next Tuesday.

World Visit: https://na.finalfantasyxiv.com/lodes...de/worldvisit/