Wow, I am stunned! Thanks for all of your commitment and feedback
Lachryrose, yes I suspected her anatomy to be off.
I am thankful for sharing your ideas with me! However I am not sure whether I find your idea too tall compared to the size I was aiming for while doing those pieces. The other two pieces are around 100-120 pixels height.
The idea of using guidelines is good! I should and will do that more often from now on.
Seiseki, I appreciate your commitment as well - it is a bit smaller than Lachryrose's edit which might fit more to what I planned in terms of size - as I said I wanted this to be all a little bit smaller, around the mentioned height of 120 pixels.
On the other side I would accept this height change compromise to keep the head as it is.
Though I am a bit confused what anatomy is right or wrong now - two different attempts of you, haha.
Nonetheless I prefer my arm pose not because of the anatomy but since it seems to be cuter and I do not think it is uncomfortable. Hard to explain - I just tried it on my own before.
Wolfenoctis, I just felt in love with your edit! I agree on your opinion that my current piece looks more chibi-like. On the other side your edit is simply stunning. Sadly I am not sure whether I should try "copying" this. Since orientating will probably just be close to copying it in a stylistic manner.
I am very thankful for you inspiration, though
I will see what I can make out of it.
Thanks everyone. I still have to think about this and how I could progress.
I might look at some more poses of other pieces to get more sure about the anatomy.