If the light is somewhat blocked then there is a chick forming. It's very hard to see structures on quail egg but the most important thing to check is the air sac forming on the right place.
I think your egg is fertile.
In my experience helping chicks get out of the shell always causes problems. They tend to be the weaker birds of the flock and eventually die.
It might sound cruel but I suggest leaving them alone. In nature only the fittest survive and if you manage to help them and survive maturity. Foot...