I think this came out pretty well if you're still just getting the hang of things!
Some things to consider for next time for the other girls:
- right forearm is too long (compare to her left one). An easy fix would be to have her right sleeve puff foreshorten more to the viewer so her elbow would look more convincingly lifted higher, thus you can shorten her forearm.
- her left shoulder/arm connection seems dislocated, so just be aware of that next time you sketch out her body before you put clothing on.
- her pinky looks a bit too thick on her right hand, which kind of throws me off, and her 3 fingers beside her index are too thin in comparison on her left hand. Plus they all kind of look the same length when the middle finger should be longest and pinky shortest. You can try curling the middle and ring finger a little to make the hand position look a little more natural (pinky out for extra daintiness!)
- her legs look short because of the way you drew her tight-highs. I assumed you were drawing this as if we're looking down on her from above, so you need to fit the thigh highs around her thighs more as if you were looking down on a cylindrical object. This will give a better illusion of that angle so it doesn't seem like we're looking at her at eye level (which will make her legs look too short).
- Likewise, you can further emphasize the above-head angle if you rounded the skirt shape more. I would also position her head down a bit to shorten her neck.
- I noticed that she stands at a slight slant (look at the angle of the corset lines in the original). I'm not sure if that was your intent, but she looks like she's standing in an unbalanced position, especially if her legs are together. I would have rotated the lineart to adjust that (sometimes that works, and sometimes you have to change the position of the legs totally)
Verbal explanations might be hard to follow, so I hope you don't mind that I made a comparison pic to show you what I mean (and sorry for how crude it is.. I was using my laptop's touchpad.. >__> ):
I hope that helps! You're probably going to improve a ton by the next pic!