Usually a pinwheel is the easiest to start with for most people. I learned it and then went to the basic boutique bow. I personally would stay away from 5/8 inch ribbon as you are learning. To me the 7/8 or 1.5 was easier to work with. Also, make sure you are using grosgrain ribbon instead of satin.
Just remember it takes time and practice. The more you make them the easier it will get