Sorry to tell you but unfortunately there is no chance of you speaking over the RT. This is only allowed by people who have an RT licence-most assistants in the towers aren't even allowed to.
I think you would probably just get to plug in and listen, with the ATCOs trying to explain what they are doing. Like you said though, that should hopefully be interesting enough for you. I think you will enjoy your time if you manage to get your passes sorted.
All the best
AFH