How do you add text to an image? You get a text box and put it somewhere you like.
Where should you put it? You should put it somewhere there is nothing really going on in the picture or try to put the text box in the shape of something that is in the image.
How do you find images you can use? You have to have usage rights.
What are the steps in google? In google image, after you have searched, you have to click the gear on the right side, and click on it, after that click advance search, then got the bottom, where usage rights is, and click it, then switch it to free to use and share.