Hello I'm farely new at drawing pictures however I am okay at drawing simple sketchs of things that don't actually exist. Whenever I try to draw a person though It never actually looks like that person. Somtimes I always look at a portrait of myself trying to figure out what is it that make me look like me. Any tips and suggestions would be helpful.

Here is an example of a simple fake creature I can draw...It looks okay.
What makes a person a person?