Most people tend to use the materials that are easily accessible for composting. Most homes have leaves, trimmings of some kind, vegetable scraps from the kitchen, coffee and tea grounds. Composting works best when different materials, both wet and dry, are mixed together.
Each day or every other day you will be taking some type of material out to the compost pile. Most of the everyday materials that come from the kitchen are listed as high N materials. Even if you start with mainly C material, this everyday adding will lead to a suitable C:N ratio. When adding material from the kitchen, make a hole in the pile and bury the debris. Move the burying site around throughout the pile. With this method you will bring about the proper C:N ratio if you cannot achieve it in the beginning.