There isn't really one that is comprehensive or would really teach you that very well that I am aware of. If you want to learn about operations one of the sim controler groups might be a better choice. Vatsim and the like do a lot to try and keep to the realism.
Are you interested in ATC as a career? There are tons of YouTube videos about that. You don't need real-time radar data for that. Like @Siris said, Vatsim does an excellent job of simulating what ATC do.
Sorry, I just see no good reason why a civilian would ever want real-time radar returns, unless they were up to no good.