cute work~ pretty nicely done for just couple weeks of vectoring.
I think you could try paying more attention on curves as you go, since its very noticeable if they're not
smooth.
I find the shading in teh hair a little stiff, not sure if it's original image or because of vectoring, using
multiple layers and shades or making a duplicated layer on gaussian blur helps smoothen that contrast out.
It's also a good idea to link the original image in your description (:
looking forward to more of your vectors~