Welcome to the Guild!
Photoshop Elements can certainly be used to create maps. You might want to check out the various Photoshop Tutorials on the site, although not Elements per se, they can certainly get you into the right direction.
Most here are Windows based users, but a few Mac users too.
Visit the tutorials forum, and view the Finished maps forums. If you have any questions, please ask and someone will be able to answer them for you.
We have a few French speaking members here, not me however.