I need to be able to place and scale a logo in Adobe Express

I am new to Adobe Express, and I am trying to build a simple landing page for a client. I have a theme. But is this really so hard? I just want to be able to place an overlay image (a small logo) But when I click add image, it imports it as unscalable. 

I just want to overlay this logo and be able to scale it. Does Express really not have layers? Pleeeaaase help I just want to place a logo!!!!!