Hey there, I saw your post about your goals for pixel art, and that you're starting from the bottom with 8 bit, I think that's a great idea ( maybe even try 1 bit at some point?)! You've done a good job at fitting all of Chun Li's costume details at such a small scale, but I think there's more you can do with the sprite, namely the pose and shapes. In my edit, I tried to more closely follow the reference, which leads to a stronger stance; don't try to fix it if it's not broken!
Since you're inspired by NES sprites; It might be useful to start thinking of your canvas sizes in multiples of 8x8, as that was the size of a single "sprite" on the console; of course many 8x8 sprites were often put together to create the full image of what we know as a "sprite".
If you haven't seen it already, Kasumi has a great post on NES in the restriction guide thread:
https://pixelation.org/index.php?topic=10784.msg115062#msg115062Also, this might be a bit advanced for where you're at currently, but I was interested in making a tracing to breaking down the Chun Li cosplayer into basic shapes. Some skill in drawing will definitely help you to improve your pixel work
Great start, especially seeing how new you are to pixel art, good luck on your journey!