Without an agent it might seem impossible.
Maybe you will wonder, is it worth it, all the effort, self promotion, waiting, trying, but if you want something you fight for it, even when it seems impossible...even when it comes to modeling.
Let each acomplishment lead you to more, the smaller ones shouldn't be dis-included, -Include all of your credits, each is a step in the right direction.
Focus on the type of modeling you want.
Focus on reality.
If you want to do hair modeling, focus on it, if you want to model swimwear, focus on it, if you want to model fitness, focus on it!