1)

Second , using the pentool to draw the outline....
2)
Third , i try to using the mesh tool to play around the color which is match to the reference
3)
Fourth , after using the mesh tool ...it's become like that
4)
Fifth , the stick of mushroom .. i also using the mesh tool to do it
5)
Sixth , using the circle to drag it then put in the mushroom below ..the color also using the mesh tool ....
6)
Final steps for the mushroom ^^