The potential to use magic more or less works the same way, but it's often hereditary. If your parents could use it, there's a good chance that you can, as well. Specific forms of magic require years of dedicated study and practice, and it's rare for somebody to learn more than one or two forms of magic.

{ Just as Zeref thought, then. He knew it was probably too good to be true. Just 'canceling' the Curse with typical forms of magic nullification was probably the first thing he tried. }

So it is safe to assume that it cannot override the will of the gods themselves, in the form of a divine curse?