Learning To Rap

Hi, I'm a complete noob to rapping. Don't even have a good voice for it, but I enjoy writing the references, the wordplay, the assonance, the rhymes, and the occasional onomatopeia.

Ofcourse there's more and I intend to learn those too, but first I wanna get atleast decent in the delivery and in terms of listening experience.

Any tips? I can't compose music for shit either, so I need to sound good without music.