Internally Deformed
Farseer of the Paranormal Abysm
What do you mean exactly?
Saying that to make it as a rapper you merely have to sound approximately like every other rapper is too general, since not every rapper sounds the same. Subgenres exist as the most obvious point.
What I'm saying is that to be able to sing you've got to be able to hold a melody, right? To be able to rap you've got to be able to talk in the manner of the black population of the city you live in. Obviously cadence and style varies from person to person and scene to scene, but that's the basic qualification "to be able to rap".
To be actually successful you've probably just got to know some other guy who can write a catchy song for you to rap over.