6. Practice carving smaller shapes. Carve around this grid or elsewhere on the melon, practicing smaller or more intricate designs. Designs with short, straight lines, such as a diamond pattern, may be easier than designs with curves.
It may take a significant amount of practice to remove the rind around a thin design without breaking it. Try to make sure the section of rind is cut fully through on all sides before removal. If you're having trouble starting the removal, stab the center of the section with the knife and pull gently.