Eecir,

  Doing character modeling is probably one of the most difficult things to do in 3d , just keep plugging away at it.   Pick the modeler you are most comfortable with and start modeling , start with simple objects like Pens, pencils and when you are happy with the results move on to something more difficult.     This is how I learned Carrara's Vertex modeler, started with a pen , then to simple cars , planes and lastly modeling people.  

 You can check out 3dXtract for tutorials on stuff like this.