This tutorial is super easy and quick. Let me know if this tutorial helped you.
Step OneOpen the image in Photoshop that you want to use. The image needs to be in black and white form. Once you've done that, duplicate your background. Right click and go to blending options. You want to uncheck the "Green" and "Blue" options as shown in the example below.
NOTE: You will not notice any changes right away. Follow to step two to finish.