[quote=Ink-berry]
Alright, I was doodling last week, and this was what I ended up with. :p (It's rather PMMM inspired, by the way.)I know the arm / elbow in particular looks a little weird, as well as the placement of the hand, but I don't really know how to fix it. Could I have some help with that, if possible? Also, do you guys have any advice on how to move from a more anime-ish style to a more semi-realistic style? I'm tempted to switch, but don't really know how.
[/quote]

The right arm's (our right, her left) proportions don't match those of the left arm. For hand-on-hip poses in particular I find that changing the angle formed by the upper and forearm will fix any awkwardness nine times out of ten. In your case, the elbow should be jutting out further and forming a more acute (narrower) angle, like so:

[hider=Redlines][img=http://www.ezimba.com/work/140826C/ezimba14379063620600.png][/hider]

My redline arm is a bit too fat with respect to the originally drawn arms, the angling is more important to acknowledge though. You'll also notice an alternative hand pose, with the thumb rather than the four fingers facing the viewer. Admittedly, it's a cheap shortcut for making hands on hips look good with less effort. Otherwise I would suggest using photo reference, since hands at that angle can be pretty complicated.

Also if this group is still accepting members, I'd love to be added to the list.