My fiction and nonfiction books are shelved on double-sided shelves about five feet tall. A magazine rack is also important. I found a rack that I can hang on the end of my shelving. This takes up less room than a floor model magazine rack. These were donated to the library and needed a little fixing up and are used constantly.
Furniture can be at an appropriate cost.
Decorative bricks and press board make nice shelves if that is what the budget dictates. If you need to order furniture, Highsmith or Demco have very nice furniture. Perhaps there is someone in your community who can build you some furniture. This may take some time, however. Lighting is very important in your library, especially if it is used as a reading area.