>>3176046You need help shading, and you lack the fundamentals which can be attained by reading one of Loomis's book such as successful drawing.
If you are to lazy to do so I suggest you learn this Riley Method by copying what the man is doing in this video This helped me master faces play it in slow mo though
Edizkhan face planes
https://youtu.be/rc84ZmrSEzYAnother great YouTube channel to learn from is Zin Lim Zin Lim YouTube Videos
https://www.youtube.com/user/zinlimpresentLastly if you can't bear to go through Loomis try go through the Bargue Drawing course
https://drive.google.com/file/d/0B9LugJ4DrjW9YXc1Q0VnVWVXdFk/view?usp=drivesdk And here's a guide on how to go through the Bargue drawing course
https://youtu.be/Pj5F2y2dXUU