Training Talk is done at Xer's place when he's home and then the Sleeping Quest is available. I don't think you can actually do any "training" yet. It's probably just setting up for a later update.
I think the "event" is just speaking to Rhot on a Saturday so he can complain about Xer not coming, fetching Xer from his hideout, and then going back to check on Rhot since Xer will be with him now (maybe once or twice). After that the training talk option should be available when Xer is home. No clue what happened if that doesn't occur.