You can't just demand edits you need to inspire people to make them.
If you show them you want to learn, the'll give edits in return.



Don't use to many colors, try to use interesting shapes, and all of the above advice
Now it's your turn!

Hey there,

Not to be rude, but I think your pose is not very interesting. I feel that in (pixel)art you need to push yourself to create compelling scenes and characters.
I know you're just starting out, but try to make your image more interesting by playing with the perspective and add a sense of motion.
The poses from pose-maniacs are great for practicing anatomy, but are, in my opinion, to stiff for these kind of imagery.
I like the design and the palette, so I used that as a base to create this:



I tried to make the scene more dynamic by making her swim towards the camera.
(The eye between the tentacles doesn't really make sense, but was to cool to leave out.)
It might stray a bit far from your original art, but it's meant as an example of what you can do with a single subject.

Looking forward to see where you take your image.
Cheers!

Looks promising, keep it going. 
Your shape are fine, but I think you could go with some bolder use of lighting.
I feel that not everything needs outlines try experimenting with just using shading.


^{rough edit.}

Hope this helps.

I couldn't pass this one up, so much retro awesomeness.
The angles of the stairs look a little steep, I would go for a more curved version like this:



with the steps slowing down at the edge for a more 3d effect.
needs some cleanup though