There are some resources online for learning Bislama, if you absolutely must understand our favourite shitty rap.
Since our main man Nawarake got his start in Vanuatu as a
pis kop, you can't go wrong with the US Peace Corps' own language learning materials:
https://www.livelingua.com/project/peace-corps/Bislama/
Pentecostisland.net is maintained by a British guy who became immersed in the land of kava through a similar volunteering effort. Lots of stuff to read here:
http://www.pentecostisland.net/languages/bislama/
There's also Facebook. As much as some of us may dislike it, FB has become the social media of choice in Vanuatu. So much that being online is known as being "green" (as in the color of your FB icon). Yumi Toktok Stret is a thoroughly random and direct tap into modern Bislama as she is spoke. Also check Bishlamajokes if you enjoy corny memes.
Finally, searching for Bislama phrases online often will get results from various missionary organizations. The LDS church especially seems to have a lot of localized content in Bislama. Mormons may not be fans of kava, but they sure try hard to relate well to every culture. Gotta respect that.