Light and shadow in lines

Hierarchy of importance. Any critique welcome

A few more tries to sketch something else this time. Any critique welcome

After watching demo

VR girl was a challenge

I'm drawing every day but sometimes I realize that I have a woody, rigid stretch of my own and in order not to give up everything I also use colors. Here are some pages of my scketchbook with some reference photos.

One more attempt. Any critique welcome

Another CSI attempt. Haven't done so much erasing in my life, very difficult to get my hand to draw a line where I want it. Any critique welcome

I guess I'll have to draw a lot more until lines are confident.

CSI boots

CSI snail

Difficult one.. Must try few more times

Before watching demo.

After watching critiques. Couldn't get it 3D enough, any thoughts why?

After watching demo

Hi, first attempt without watching demo. Any critique welcome