2D sprite in Unity is not displaying the picture I assigned to it

So, I just got started with Unity3D and I don't really know what I'm doing.

I'm following an online tutorial and so far I've downloaded an image, imported it as an asset, and dragged this asset onto the "sprite" box(under sprite renderer) where, apparently, we are supposed to drag a texture onto a sprite. When the tutorial does it...their image shows up in the scene. Mine, however doesn't.

When I click the little circle to the right of this, and go to the 'scene' tab, there is only an option that says 'none', while in the tutorial the image that is desired is also an option. I feel like fixing this will fix the problem.

Thanks

If image is not showing up when you're browsing for it Unity3D it means it has not been imported to project as asset. To do so, from Unity3D editor go to folder Assets, right click and choose Import New Asset:

Also you need to browse in Assets, no idea why you're browsing in Scene.