Modeling in 3D can be fun and occasionally frustrating but nothing is more painful that trying to model a face that can deform without breaking when it moves. If you are studying topology then you understand what I mean when I say that. In my opinion, the true skill of modeling comes in when an artist can not only build a credible likeness, but also lay down all the necessary topology that will allow this face to retain it’s likeness as it deforms and emotes.
In the meantime, if you’re looking to get started, this is how: