oh there should be instructions. call the place where you bought it.
i do Sunbonnet Sues the Eleanor Burns of Quilt in A Day way-she gets light weight fusible. it has dots you can feel on the fusible side. she lays that side down and traces the pattern you want on the smooth side. lay it on the right side of fabric, stitch on the drawn lines. then she trims the seam allowance, clips a small opening in the fusible and turns it toward the back of the Sue. then finger presses the edge and fuses with the iron onto the background fabric. this light weigth fusible is meant to be sewn through.
there are other fusibles out there you cannot sew through!