Draw a simple trunk with two slightly curved vertical lines
Add a few main branches extending upward and outward
Sketch smaller branches coming off the main branches
Outline the canopy with a loose, irregular shape
Fill the canopy with clustered leaf shapes or textured scribbles
Vary the thickness of the trunk and branches
Add roots at the base if desired
Include bark lines on the trunk for texture
Refine the overall silhouette to make it look natural
Erase unnecessary guide lines and darken the final sketch