Jeanne, you might want to experiment with putting some of your quilt ideas on graph paper. The nice thing with that is that you can use the little squares to represent whatever size you want them to be. You can use it to design a block or blocks, and then you could use it for making a miniature drawing of your quilt. Colored pencils are helpful too, if you want to get ideas for color schemes. I'm not great at all that math either, but the graph paper helps to keep it all in proportion. It's kind of like having a computer program, only you have to do all the work! This is just one idea, but with all the awesome, experienced quilters on this board, you are sure to get some great feedback!