my crit do you is to use a very hard pencil at first and then switch to a 5b or 6b or something. i say this because smudging is real apparent in your images. One of my prof's suggested that we draw with our palm not touching the paper..so if you can do that give it a go. it takes practice and determination but if you can do it itll really help with the cleanliness of the image. also if you have some time to draw figures give this site a go
A little project I've got going with a girl from my class. I'm gonna draw her once a day for the rest of this school year.
It might not look like her from the outside, but it definitely defines her from the inside (from my point of view that is.)