Learning to play a tricky rhythm by sight is not easy. Finding the notes is one thing, you can just look those up if you don’t know them. But getting the rhythm right can be tough, and that can’t simply be looked up. This is a real problem but it does not need to be a problem anymore. If you have a smart phone or a tablet you already own a pocket music teacher. Its name is PlayScore. With PlayScore all you have to be able to do is take a photo. PlayScore is a magic sight reading app. Inside PlayScore there is a demon sight reader ready to play anything you can throw at it.
Download the free version and try it. You will be amazed.