Be careful of copyright.It is safer to create your own images.
Using Google images: "most of the images on google image search are copyrighted and shouldn’t be reused without the artists permission. In the same search tools area, you can select “labeled for reuse” and you will find images you are allowed to use for free. "
Taken from the following article on finding free images
https://first10em.com/2016/11/14/images/.