I don't believe you can learn how to dance by reading text and looking at animations or still photos. But sometimes you may not understand your teacher's explanation in class, so it may be helpful to see another teacher's description of how to do it.
Belly rolls are a big part of this form of dancing: Belly rolls are controlled by three sets of muscles in your abdomen. There is the diaphragm, which is between the navel and the rib cage, the pelvic muscles, which are below the navel, and the obliques which run vertically on each side from the pelvis to just below the breast. The first thing you need to do is build a relationship with all three sets of muscles, and get all three sets of muscles comfortable with the idea of moving when you tell them to.
Backbends (also sometimes called Turkish folds) are more difficult and put more stress on your back, but definitely are something that can be learned. You just need to know which muscles to work on, and how to develop them.
Once you master the basics, you can advance to shimmying and shimmy-walking. Good luck!