Outline a shape and then change the rest of the picture to white?

Hello,
I was wondering how to outline a shape in a picture and then make the rest of the picture white.

I've included 2 pictures:

This one is an example of what I want to do:


This one is the picture that I want to edit (Outline the shoes in the picture and then make the rest of the picture white):


It seems like this can't be too hard but I'm really bad at Photoshop.
Any help would be really appreciated.

Thanks a lot.

Use the magnetic lasso tool to select around the image and then select inverse and delete the background (just make sure your background color is the color you want before deleting)