Hi @ReneePatrickTrailConsulting,
If its a jpg or png, you could try importing that into your map as a media layer. In the add media layer window you can use up to 4 control points to scale / place the media, as well as configure properties like transparency to see what is underneath the image.
You could either display the media layer on your map, or you could use it to trace the shape using the Sketch tools, depending on your needs. Check out ArcGIS Online Help for step by step instructions on how to add a media layer to your map.