Not bad! :) just a tip since is your first trial with the cartoonist style: Don't be afraid! Jump into it, don't be shy, break the rules, exaggerate, experiment until you find what suit best for you. Don't stay too close to the realistic style, even it's the style that you're more familiar with. Go nuts! :D Then, eventually, if you're looking for a semi-realistic cartoonist style, find the right compromise, but not before having understood both the realistic AND the cartoonish style. However, really nice drawing, great colouring and I particularly love how you have rendered the hair!