Welcome to the portfolios! Looks like you are off to a good start.

The first pic of Vicky, the neck is just a little too long and the shoulders are boxy. In the second pic, the proportion of the head is too large for her body. And the hands are a little small.

The pic of Megan is actually very good. I love her clothes and the way she is standing. The neck goes in too much where it joins the head, and the lips don't seem to match a manga-ish style. And don't worry about the proportion of her head! It's just right! The neck could be a tad longer, but it looks great. Try rounding your eyes a little more. They shouldn't be boxes. The shirt draping is really neat and love how it looks like it's floating a little.

Can't wait to see more!