Help - Display uploaded user image in movieclip for transformation


I’ve got the users photo uploading, now I need it to be displayed on center stage and scaled automatically to a particular size without distorting it.

Then I’m going to allow the user to rotate and scale it via sliders, to fit their face behind a mask for loading onto an animated character in the next scene.

Can someone link me to a tutorial explaining the first sentence in particular? I don’t think I’m searching the right keywords, my google results are hopeless.