Welcome to art school! 
Great start! The colour work you did is done well. Did you test afterwards with the colour picker to see how close you got?
With the lines and the circles. I would practice perhaps ghosting your lines first. So draw the line without touching the pen down. And then one you have the "feel", then just draw it in one quick motion. Same with doing circles. If what I said makes no sense then pop it into google and you will likely fine a video showing what I mean.
Keep it up!
