This is me damn it.
The photo above is the Featured Image for this Page; you’ll see where to edit it on the Edit Page. You can choose any image you like for this space — as long as you have the rights to use it! — or you can choose to have no image at all, like the Resume and Lesson Plans pages.
A website like Unsplash is a good place to go to find interesting images that you can use freely on your own website. This one is by Clay Banks. Make sure you give credit when you do make use of someone else’s work. Also, be sure to fill in the Alt-Text when you upload your image, so users using a screenreader can also enjoy your site.