Image help needed

I am provided a little form as an assignment but, they are not providing the images.
Please tell me where can I get a background image like this.
I have also seen it on many sites but don’t know where to get.

You can get free reusable images at

unsplash has photographs i think this is an illustration so,how can i find it there.

Have you tried using Google to search for illustrations? What did you find?

sadly, no good results yet😔.