Daniel, if you follow Tootler's link you'll find texts for hundreds of ballads, As your project is due very soon, could I suggest you look at ballad no.20 'The Cruel Mother', just to get you started?
Big story, big decisions, big emotions - plenty to get your teeth into!
Good luck, and hope you enjoy it.( And if you're feeling adventurous, try Googling that title, and you'll find audio links too.)