How do I upload or import a photo into Maya?

Answer 1

Depends on what you want to do with it.

If you want to use it as a guide to draw something else, you probably want to use an Image Plane.

Go to an orthographic view (top, left, front) and View > Image Plane > Import Image.

If you want to use it as a texture on an object, you'll attach it to a material by clicking on the checkerboard next to the Color of the material and using a File node to load that photo.

I can show you how to do either of these any time you want!