1. Upload your own image
One way is by choosing to upload your own cover image, by choosing “Upload image” in the right corner of the current cover picture.
2. Search pictures from Unsplash
Another way is to use Unsplash for pictures. If you need inspiration, you can browse and search through thousands of professional images from Unsplash.
Hover over the picture you like, and press select picture to select your chosen image. Remember to press save in the bottom.