Click the Crop Tool in the Basic Tools section, and cut out a region corresponding to your face. After selecting your region, click in the Tool Options window.
Use the Select Image tool to select the image with you in it.
Right click and select smart recolor.
Select and a select just the region corresponding to the face
Select the Keep tool and select regions of color that are different than the faces
Select Predict Unknown Region
Use recolor, keep, and predict to refine the region of changed / keep color. If the area is too difficult to adjust directly, try setting it to Let Computer Choose and then predict again.
Select Tint, a green color, and how light/dark it should be. Try using solid color to get a better idea of which regions are being changed, and then you can refine it further as described in step 7.
Use the Stretch Horizontally Tool in the Distortions Menu to stretch the bottom of the image horizontally
Use the Bulge Tool on your forehead