This is a very simple illustration done using Adobe Photoshop and Adobe Illustrator. This tutorial may help you in getting an inspiration or a basic idea of making an illustration.
This process involves mainly two steps
-A rough sketch in Adobe Photoshop
-Final Illustration in Adobe Illustrator
The colour codes used in this tutorial
-Main Green (Hex - 42f679)
-Dark Green (Hex - 3edb66)
-Darker Green (Hex - 3abf53)
-Pale Yellow (Hex - fdf09e)
-Pale Brown (Hex - b8ae7b)
-White Shadow (Hex - ffffff, 25% transparency)
-Black Shadow (Hex - 000000, 25% transparency)