If she isn't litter trained I would just have non slip vynil on the floor of her housing so she can see clearly where to toilet. I only feed hay where the litter trays are, as they like to eat pee and poop at the same time! This will make it easier for you to clean up after her too. If you can clean up stray poops and mop up wees and neutralise the area with vinegar water mix it should help her get the right idea. You could use puppy pads in her tray with hay on top so long as she doesn't eat them. You might need to provide more trays if she insists on going elsewhere.
A large litter tray helps, lots of us use the under bed storage boxes as there is plenty of room and it stops them weeing over the edge!