The next step.
Applique is used extensively in quilting. "Dresden Plate" and "Sunbonnet Sue" are two examples of traditional American quilt blocks that are constructed with both patchwork and applique. Baltimore album quilts, Broderie perse, Hawaiian quilts, Amish quilts, Egyptian Khayamiya and the ralli quilts of India and Pakistan also use applique.
Applique can be applied with a straight stitch or a satin stitch (best done on a machine) and involves the placing of smaller patches of material cut into shapes and attached to the quilt using mainly hand stitching. There are sewing machines that can sew on applique these days but most seroius quilters still prefer to do this by hand. It can be very rewarding to watch the transformation taking place as you add the extra touches to your work of art. It is also a very good way to relax. A very effective form of meditation if you like. There are many other ways to applique. eg. The Blanket stitch.
There are many educational videos on the internet that can show you how to applique but the best way to learn properly is to find a quilting group nearest to you and join for a while. These groups consist of learners as well as seasoned quilters who can teach you so much.