You can queue up for DR at Gangos, I don't remember the NPC. If you're not asking that, then I don't know what you're asking.

But, you're doing content that isn't current anymore so there's definitely a good chance that people aren't doing it. PotD is fairly evergreen, so you probably have a better chance with that. Alternatively, you can find a community/FC/something that runs DR still that would be willing to take you.