[quote=@ImagineTheStars]
I'd be interested, 'cept, I don't know much about JJBA. At all. I watched the first episode, that's it.
[/quote]

If you enjoyed the first episode, I'd recommend giving the series a watch! I'm, of course, biased in thinking it's pretty great. However, I will say that things change a LOT between Season 1 and Season 2 - and even the seasons beyond that usually introduce concepts that are fairly unique. My OC is particular to Season 4, or Part 5. 

If anything, the JoJo Wiki is a great resource! And thankfully it isn't hosted by those annoying Fandom wiki sites... so it's a lot easier to browse. 

I suppose you wouldn't have to know EVERYTHING, depending on what you'd like to RP, but learning about stands or the characters in Part 5 would be a good start, I think.