Something I use to help me create reference images is the program Design Doll. I use the free version. It allows you to create custom 3D models in any pose you would like. You can even create lighting effects so you can see how the skin looks with different light sources. Might be something to look into.
​
Also, I love how you colored this piece! The skin looks very pretty.
I also suck at getting proportions right, so I use Design Doll (free) to get a mannequin into a pose that I want, take a screenshot and draw over it in GIMP (also free). It obviously takes more work than using a character creator, but it does mean that you aren't limited to the use of a finite set of assets and you get to practice your drawing skills. Good reference pictures also go a long way.
Cute :3
And for hands, why not use your own hands, or finding a posing program/tool to pose a hand and then try drawing it from different angles?
DesignDoll isn't bad for making custom poses, but it does not simulate skin/muscle/fat very well. If you use DesignDoll, I strongly recommend turning the skin-mesh off and going into art-view to view the torso, pelvic bone and the overall pose.
You can get DesignDoll here: http://terawell.net/terawell/?lang=en
As for hand-posing applications (specifically intended for hands, but may have other options) I know of some phone apps like Handy that could be helpful. It costs a few dollars, but it might be worth it.
There are also websites that take photos of common hand poses and store the pictures for people to practice with, like https://www.quickposes.com/gestures/timed (you can select hands to specifically practice drawing hand gestures) ^o.o^
https://line-of-action.com/practice-tools/figure-drawing/ gives you a bunch of photos to do pose sketches with, and lets you set a time limit.
If you need an offline app, Blender with a rigged model. Blender is waaaay overkill for just doing pose practice, but if you're planning on doing 3d modeling at some point it's a useful skill to have...
http://terawell.net/terawell/ is the closest match to that exact app that I could find.
i use design doll.
it's a 3d modeling program, sort of, that acts as a poseable mannequin. you can adjust the proportions of everything as you see fit, and they're ultra-poseable. the free trial has unlimited uses, you just can't open saved projects, so just export your finished pose as a flat image and use that. the benefit of it is you can get the exact pose you want from any angle without being limited by trying to find a photographed pose that's not quite what you want.
I don't know about an extension, but there are standalone programs that replicate wooden artist dolls that are used for the same purpose.
The easiest to use I found is "DesignDoll"
It seems that your comment contains 1 or more links that are hard to tap for mobile users. I will extend those so they're easier for our sausage fingers to click!
Here is link number 1 - Previous text "one"
^Please ^PM ^/u/eganwall ^with ^issues ^or ^feedback! ^| ^Delete
Okay so I can't take credit for that. I used this Software here and have used it for all my characters in my scenes: http://terawell.net/terawell/?lang=en
It's called Design Doll and you can pose your characters and model their body as you please. It then allows you to export the OBJ file and use it in your 3D app. It's pretty cheap. Mostly used for Manga posing but I use it like this. I'm prolly going to switch to poser though.
I modeled the Mask, egg, bench, wall, floor though
Look at references. Tons of references. And be prepared to draw hundreds of them. There's also this program called designdoll which is basically a 3d model that you can interact with (pose, resize proportions, etc), which is really great as a studying tool since 2d references can be limiting. They also have a catalog of poses that you can use/study if you don't feel like making your own.
Not sure if I'm allowed to share download links but I got mine from this post. And no I don't draw furry art.
I don't know what purpose this is for but you could try Mixamo's Fuse now that it's free on Steam since Adobe bought the company.
Alternatively I know a couple of people who use http://terawell.net/terawell/.
"Design Doll is a software program that can freely manipulate human body models in 3D space."