Put together practice pieces and practice before you do your quilt. There are lots of tutorials, videos to watch. Practice on small pieces first. Placemats are a good size. You need a ( hopping foot) sometimes called a darning foot, sometimes it's good to just draw some easy, flowing lines on a practice piece and practice following the lines. As you become comfortable manipulating the fabric you can do more designs. Start drawing on paper to ( set) the design in your brain. Don't expect perfection from the start, it takes practice.