A Creole is a mainly spoken language (emphasis on spoken) that is meant as an really simplified version of a base language.

(French-Haitian Creole),(English-Patois),(Assamese-Nagamese),...

I'm interested in learning Nagamese because I've been putting my eyes on too many european languages. But how would you even learn a language where it's purpose isn't even designed to be written down..people will have different pronunciation of the same word because of limited standardization. Unlike Assamese with formal documents, literature, media. People who have learned a Creole/ Patois/ Pidgin, what are your ways?