What is the structure of a lipid and why is this example non-polar? Lipids usually consist of 3 fatty acids and 1 glycerol. I looked up what they look like

So how is it not a polar molecule?  The $\ce{-OH}$ side has negative charge, and the hydrocarbon side chain has a positive charge.
Lipids usually consist of 3 fatty acids and 1 glycerol.


That's wrong. You're giving the definition of fats, which are just a subclass of lipids. 

The structure in your question is the skeleton of cholesterol - without the stereochemistry.