I always use Google to search for pictures, because it is easy to find ONLY the pictures that have been marked for sharing.
(On a Mac in order to get a copyright symbol go to System Preferences>Language and Region. At the bottom of the window that appears will be a checkbox with the words-Show Input in the Menu Bar. The menu bar is the very top bar of your computer screen that has the date and time. When it is there you can click on it and choose Show emojis and symbols. The Character Viewer will open and you can go to Letterlike symbols to choose the copyright symbol.)
Following are the instructions for choosing a picture from the Internet, saving it on your computer and then attaching it to an email message.
Press Shift if the pictures that you want to choose are in order.
Press Control (ctrl) if the pictures you want to choose are not in order.
8. Once you have chosen all the photos you want press OPEN and they will be added to your email.