if you are going to a school talent show dont play something that an old man would play, no offense but if you dont want to get laughed at, nothing against that music but some people are creul. but you play whatever you want. I would play somethin like simple and kinda modern for you expierience. i dont think you will be able to play the whole "nothing else matters" by metallica by urself....but try whatever you feel and practice it so you can win