The picture

The lesson
Draw circular axes for lemons
Use light circles to position lemons accurately.
Add lemon silhouettes around axes
Outline lemons with smooth, rounded shapes.
Define masses of lemons and leaves
Focus on the volume of lemons and leaf shapes.
Add details like texture and shadows
Include dimples and highlights on lemon surfaces.
Clean up lines and add background texture
Use soft strokes for a textured background.
Apply base yellow color to lemons
Use a bright lemon yellow for the fruit.
Fill in flat colors for leaves and background
Use dark green for leaves and light grey for background.
Render with highlights and shadows
Add white highlights and darker shadows on lemons.