Draw a simple pot or ground line
Sketch a tall oval or rounded rectangle for the cactus body
Add one or two smaller side arms if desired
Round the top and edges slightly
Add vertical curved lines to show cactus ridges
Draw small dots, short lines, or tiny spines across the surface
Outline the shape more clearly
Erase any unnecessary sketch lines
Add a pot, soil, or rocks at the base if needed
Color the cactus green and the pot brown, red, or terracotta