Can't promise it'll be easy, but you could try "the pistol slapper blues" by Blind Boy Fuller, later covered by Rory Gallagher (Check it out on youtube). I learned it recently myself and it's a brilliant angry blues track! alternatively theres a little known Americana blues type band around at the moment called The Beauty Shop and they are fantastic, and it's all dead easy to play. Very bitter lyrics!
Good luck with it anyway.