You can do a search for vector graphics (which expand without loss of detail), and find a number of websites where they offer a significant number of useful graphics for free. They offer them for free, of course, to entice you to purchase their expanded services; but there is no requirement to do so. Here are a few spots, with a couple of examples from each, to get you started.
You can use any graphic program to crop (cut) any of these images. It’s simple, fast, and the basic programs are already loaded on your computer. With more sophisticated graphics software (some of it freeware), you’ll be shocked at what you can do.
The image above comes from Vecteezy, and the one below is from Freepik. Oh, and Freepik also offers royalty free photos!