We are going to learn how to draw geometric shapes, this will help us to later draw a still life or a group of objects. Lets start with a circle.

Behind the circle draw a square. Later, when we want to draw a still life, the circle can be used to resemble an apple and the square a sugar shaker, for example.

Convert the square into a cube, give it some volume. If there are small mistakes you can always correct them. When you are drawing you can always make small mistakes.