When printing you can try choosing landscape layout for better placement on A4 paper
1) Draw a rectangle that will define the conditional proportions and boundaries of the chosen drawing.
2) From the middle of the rectangle, draw one vertical and one horizontal line equally dividing the shape.
3) Draw another horizontal line equally dividing the upper half of the rectangle. Similarly, draw a horizontal line equally dividing the bottom half of the rectangle.
4) Draw a vertical line equally dividing the left half of the rectangle. Similarly, draw a vertical line equally dividing the right half of the rectangle.
Mark off the width and height of the picture. Draw the stems of the calla lily.
Draw guidelines for the leaves. Add the styles.
Draw lines to show the edges of the leaves and flowers petals.
Add more lines to the petals and leaves of the calla lily.
Work on the whole figure, paying special attention to detail.
Draw several lines on the stems and petals to show their curves.
Contour the calla lily, trying to vary the thickness and darkness of the line. Erase all guidelines.