Drawing the body
The average human figure measures at 7.5 to 8 heads.
This can change depending the height of your character.
But, you must make sure to draw the character in the correct proportions.
Character Figure Drawing with a Grid
Example of using the template: Copy the character on the right.

Grid and drawing using the stick figure

Figure Drawing Chart
Creating your own grid
Draw the head of your character.
Use a ruler to measure the head of your character
In this example the head is 1 inch
Use the ruler to measure the height of each row (in this example it is 1-inch)
Use the ruler to create the straight lines to create 8 rows.
Character Worksheet: Front, Side, 3/4 View
Drawing clothing
In addition to understanding human anatomy, you need to also understand how clothing is drawn.
Use references to understand how folds and creases forms on the clothing as it moves with the body. Also, understand how clothing are stitched together.
When drawing, start with a sketch (stick figure), then build up your drawing.
Process
Left drawing if the rough basic sketch. The drawing on the right is a sketch with more detail
Character Sketches
Understanding how to draw the human figure can improve your sketching skills.
Sketches do not have to be perfect. They are meant to put ideas on paper and practicing on your drawing skills.
This example shows quick random marker sketches. In this example, I was practicing on poses and using gray tone markers.