Going up from the prism make an outline drawing of the handles. For this step you can just define each with a single line. You also don’t need to be overly precise with the curves … See more

For this simple stage of the drawing add the inner outline of the handles to set their thickness. Try and do it in a way where they have a consistent width through their entire length.… See more

Outline the actual shape of the bag based on the prism. Make the lines that define it slightly wavy/and uneven to give a sense that the material of the bag is slightly bent/warpe… See more

Draw the folds on the front side of the bag as shown in the example. Try and make the lines that define them slightly wavy as well to again give a sense that the bag is made of paper.… See more