@oldeststoryteller
I took a look at your prologue and chapter 1 part one.
Editorially you need a very few fixes. A couple changes in narrative and a few run-on sentences. Nothing someone else editing for you can't find.
I'll start by saying that I'm not your target audience. Marital arts hat isn't my thing, so there's are things that I might not get that others that are a fan will inherently understand.
That having been said, I have a bit of things I want to share.
First, while the world seems interesting at first glance, it takes a minute of reading to know you've set up an impossible situation, I mean the MC - as a baby... Has to be rescued by his sister. Which directly contradicts the premise.
Not even as brutal as Sparta was, did they prey on thier newborn or young children. I mean holy Hannah you even say that the father would kill his own kid for being weak as a child.
For not wanting to create an edgelord you are surefire on the way to doing it...even this early in.
So, we move into chapter 1. Miraculously the MC made it to the ripe age of nine so he can go to school.
We find out almost nothing physical about him, but we know he's gifted with martial arts.
Meets a girl who's nice to him, he's mean.. Per his nine years and they end up chatting the rest of the chapter over the span of what I guessed was months.
Okay. Your characters have zero depth. They have no personality. All we get is speech and more speech. Bring them to life. Give them mannerisms. Give them quirks.
Next is a pet peeve of mine
The singular set of ellipsis "..." <--- those are freaking awful. The point should always be to show your reader. If the character has a particular look, show us. Don't just throw up some dots and infer that we know.
Next is the concept that these kids...yes kids have any idea what philosophy is, let alone employ it. The main character at this point is 9. I highly doubt he knows how to spell the word let alone anything else. If you want the children in a brutal society, that's fine. They are still kids. They won't think like adults.
Beyond that, I think you've got a fun and likeable concept. It only needs a few tweaks to be wonderful.
Thanks for the read!