Critique my work

Hello all.......am new to this group.....past three months am working on pencil drawing.And i never step any art school in my life......but i love drawing even from my childhood.....so i started learning few basic techniques through google n Youtube as well....here is my recent portrait of Taylor Swift.....i wanted to improve my work ...so i request u all to take a look at my work and to give your valuable critiques......

https://www.facebook.com/photo.php?fbid=172679092884791&set=a.164340077052026.37978.100004281035664&type=3&theater

the link tells me i dont have permission to enter