Complex sentence: And soon enough Nepalese rappers published their music underground even though the audience were usually Nepalese living in the United States and seldom audience from Nepal, the underground internet Nepalese hip hop scene was booming.
Split into simpler sentences: And soon enough Nepalese rappers published their music underground. Even though the audience were usually Nepalese living in the United States and seldom from Nepal itself, the underground internet Nepalese hip hop scene was booming.