Fall is the best time to wear sweaters and blankets styled clothes. However, being an older woman, you may want to avoid heavily knitted sweaters. Stick with light sweaters with bright colors and not much decoration.
The main point of fall outfits is to look somewhat warm but still stylish and trendy. Fall is the transition from summer to winter. So definitely light sweaters, scarves, booties, and transitional jackets are your get go.