Everybody is scared to try foods at the beginning, but unfortunately, since everyone is different, you need to try your own thing! Trial and error is how most of us found what works for us. Start with Breaking the Cycle and gradually add stuff.. see how you do with those foods and if nothing happens, then great!
Unfortunately, you have to have a lot of patience with IBS because it does take a long time to figure out what your body likes and dislikes.