This is the result.
And the before.
Step 1: Make the image rougher.
Open the image in Gimp and duplicate the background layer.
Go to Filter > Edge-Detect > Neon
Use the standard values (Radius: 5, Amount:0)
Go to Colors > Desaturate to remove the color from this layer
Go to Colors > Levels
And drag the black and white points for the Output Levels inward.
Change the blend mode of this layer to Subtract and lower the opacity to around 40.
Step : Add some film grain and light up the image.
Create a new white layer and fill it with white.
Go to Filter > Noise > HSV Noise.
And change the blend mode of this layer to Overlay.
Step : Add some color and make the image darker.
Change the foreground color to #403e14.
Create a new layer and fill it with the foreground color.
And change the blend mode to Burn and lower the opacity to 25.
Step : Add some vignetting.
Create a new transparent layer.
Activate the brush tool, set black as the foreground color. Choose a big brush and paint over the image like this.
Go to Filter > Blur > Gaussian Blur and change the Horizontal and vertical blur radius to 200.
Lower the opacity of this layer to 30.