Here's to the first book and more to come!
I was fascinated by your story. And the critiques I have are honestly so trivial (and mostly to do with formatting), that it honestly doesn't detract anything from what I really care about - the characters and the plotline. I absolutely commend you for the female characters you've written. They're real, they're powerful, and they're independent all in their own unique ways. I honestly haven't seen such good handling of characters in fantasy stories for a while now. But that's not to say the male characters weren't good either. I absolutely loved Jacob as the naive, honorable noble, and surprisingly, Halvar was one of my favorite characters despite the antagonistic situation he finds himself in with Jacob.
Read the story now
My first critique is honestly really mild. You have a longer novel at hand, so I suggest you actually cut some of the chapters up into smaller chapters. Though that doesn't seem to have an actual effect on the storyline, there is a psychological effect on the reader when they're reading and they're like "Wow, the chapter's still going" versus "Whoa, that's the end of the chapter. NEXT!" B/c it can become rather fatiguing when a chapter doesn't seem to end, and it's completely psychological in this case.
My second critique is the dialogue. For me at least, when you cut up a dialogue into paragraphs, I actually lose track of who's speaking and sometimes had to scroll back up to check the conversation hadn't shifted to a new character. I would suggest that either give a single paragraph of dialogue to each character that speaks or find a way to replace the dialogue with narration instead.
However, as I've said before, my things have nothing to do with the actual story written, and I loved every moment of it. Just something to note: the first chapter did start out slightly cliche with a noble boy not excited about the prospect his father had laid out to him etc etc, but that's not an issue with me because I love reading books that start cliche and become something different (which is your novel). However, I know some people not agree with me as happily, so I just thought I'd give you a heads up on that was all.