Thank you for writing in, adding the image as your section's background is not going to work. Please add your image as an Image element inside the section, that way the sections gets the height of your image.
In that case, you need to create a Full Screen Slider using the Slider Revolution extension. You can install extensions under X > Validation > Extensions
After you finished creating the slider, you need to set that as the Slider Settings: Below Masthead of your home page.
Hope it helps,