The first picture is very good. It seems to me that you have good eye for the values and patience for the details. Which is more or less all you need (+ambition). I would suggest though to try to deconstruct your figures into shapes first and get to the values second. This way you can avoid mistakes like the second figure where the left eye of the girl is a bit off.
thank you both! pixel cheetah:your right I'm often focused too much on the detail and kind of forget to see the whole picture. I'm working on it =) HAJiME: no didn't smudge them on purpose, i think it's because of the quality of the fotograph (I don't have a scanner)
So here's some more: