Shadows Building a house

[SatanTM]

I am having difficulties. I am building a house in Sketchup (I know it's inferior but I'm a beginner) and I want to know how to add definition to the home. it's all white, but there are no defined corners and walls. Like it just looks like an all white slate with no defined shadows or lines for the walls.

[Fritigern Gothly]

Stick a texture on it.

[Kyrah Abattoir]

Sketchup isn't exactly known for its amazing rendering.