Have you seen Kyle's training here? How to Find & Add Images to Your Website

You'll need to add it to your site's media vault and then reference it in post and pages. To upload your pic just log into your site dashboard and go to Media. Once there click on Add New and then drag the image into the box or click on select files.

Once you have it uploaded you can use it pretty much anywhere on your site.

You need to upload...
Other way round