I didn't know there's a related course to rap. Well, I'm a starter too like you. But rapping is learning from your mentor. Rap itself is a kinda street thang, right? Ahaha.. They would teach you on how to write music, rap to beat, and stuff. No need to go to class to learn rap, it's all about letting yourself go, express yourself. Basic, freestyle rap (cyper). Practice at home and tries to know your strength in rap; whether it's your tempo, low tone, rapid-fire rap and etc.