Forgive me if this seems like a stupid question but I am interested in joining the speed running community and starting on this game. Is there a specific version of the game that is used?

Thanks!

We just use the steam version with columbias finest dlc typically for sugar rush and or fleet feet.
Other part is just installing HRH mod if you want to run any% with it for that no rng reset.
I recommend joining the discord in the left sidebar and you will get some quick responses there on anything else.