Extremely Noob Question About Objects

So I open a new project and double click the layout and add a tiled background, I make it the size of the entire layout yet I can't see anything but the blue outline indicating its presence, same goes for any sprite I add they're all invisible minus the blue outline. I'm working with one layer, what am I doing wrong/not doing?

try setting your background img to base layer

on top of that layer add one more for your game sprites

another layer for ui etc

& use proper z-order per layer