Step 1 – Look At the Nose as Simple Shapes
First off, if we look at a nose and think about what we see, we see a triangle, a circle at the bottom of the triangle and two ovals as the “wings” or nostrils which one will be on one side and the other on the other side of the circle (though depending on the angle of the nose (or face) we may only see one nostril). In our example below the nose is facing us:

The figure below demonstrates a nose looking left or right of us (or profile view) using the same simple shapes as shown above.

No matter which example you use, use very light lines to start out with. So, if we are going to do this, let’s do it!
