Yeh.. I'd practise a little more before deciding that your fingers are too fat. My dad has fat fingers and can only "comfortably" play on his Classical guitars but that doesn't mean he can't play my electrics. Also, I even find myself having to relearn where to put my fingers when I play on a wider neck guitar. Like my Epiphone SG has a wider neck than my strats do, so I always find it a little trickier to play it because I am not used to it as much as my strats.