Well, fortunately, you'll have better teachers than necessity and desperation.

[ His voice is rather warm when he says that - then, wryly: ] If I do not flatter myself overmuch to say so.

And honestly, dear mademoiselle, a pleasant singing voice is skill enough to contribute, indeed. One of the best things you can do is show that Rifters are not fearsome, wicked creatures. Learning some proper tavern songs, perhaps some sections of the Chant, and being kindly before and after your performance will do quite nicely.