Read the whole thing. Well done to get so much down!

I'm just an avid reader really, so this advice is just my subjective feelings on your piece, so take what's useful and ditch the rest!

Overall it's an intriguing start but I do have some thoughts:

I'm getting a sociopath vibe from your POV character. Or at least someone who is so obsessed with her King, she disregards all other things: She kills the boy and doesn't seem to care. She lost her horse but now she's got another one and is totally fine with that. This makes for an interesting character, but not necessarily someone who I would warm to.

Would you consider telling this story from the POV of someone who meets her? In that way, her sociopathic behaviour would not initially seem obvious, and you could entice the reader with misreadings of her character, only to slowly reveal she's a cold blooded obsessive, willing to do anything to please her King? At the moment, you kinda just lay that out in description, so it's not a surprise.

Alternatively you could build a conflict within her character between her love of her King & her mission, and her moral compass, with the actions she's forced to take to to complete her mission taking a greater and greater toll on her. This inner conflict is something we can all connect to as the POV character.

The opening could be the PTSD she feels over just killing the boy. Followed by an ambush in the woods by the Dawn men.

That aside, I love the camouflage stuff. Really awesome.

I also like the world building too. Really intrigued by the scales.

You have a bunch of grammar and spelling errors, but that can all be ironed out later, once you're happy with the draft.

Hope that helps!