In summary you say, I'm losing hope in my artwork because I think it might be bad. Really, all great artists start somewhere, they are not born with talent. They develop their skill in art because they love their art. If you give up, you will never know what you will have made. So I reccomend that you keep on going. I also reccomend that since you seem to be interested in faces, that you study one part at a time. For example if you wanted to start with hair, you could search for YouTube tutorials on hair and spend as much time as you want practicing just hair. Then you could move on to a different part of the face.