Rita, either a lot of functions are not yet operational, or it is not the least bit intuitive! That can be very frustrating!
On the fabric colors, I tried to stick pretty close to Bonnie Hunter's suggestions, but her aqua/teal choice of paint chip was more green than the colors I chose, which range more toward blue. I like what I've got, though, so that's all that matters.
I have my backing fabric, too. She made a point of saying that one of her inspirations was the black and white tile floor, so I choose a black and white background fabric.