@Calithea_ Hello. I'm sorry for replying too late.
First of, I love your choice of the names for your protagonists. Maximus and Kaia emmit this assertive yet mysterious vibe on them. As well as intelligence.
Your story flow is also quite interesting albeit not too cliché. It is immersive and a tad unpredictable.
I guess the only changes that you'd have to do are the punctations on the sentences when a character is speaking. Minor punctations like periods, commas, question marks,and especially exclamation marks really cement a well published book.
Good luck and I hope you all the best.