Okay, well, first, yes, your chapters can be kind of long, but if they were in a book format with pages and such it probably would only be about five pages maybe a bit longer. I'm not sure I've never tested this. But they're not too too long. However, I will say that usually the length isn't a problem, especially if you're eventually going to put it into a book format and the chapter are interesting enough.
Secondly, I've skimmed through your intro, and I still like it. But it does take a little bit of time to get introduced to Tia. I would say, maybe shorten that just a bit, and make it so we get into Tia's head first, then maybe slowly pan out and start doing more of that third person omniscient perspective that would immediately get your readers attention. And that would help give the readers questions. What does this king want with the girl? Why is she so important? And giving them a specific characters to focus on right off the bat.
One thing that I would like to say is that your characters are interesting. This book is very character-centric and I enjoy that, I don't mind. but be aware that as you write these characters there is still the plot, and since this is probably going to be an epic fantasy with the way it seems to be structured, it's a slow build.
And I'm going to admit, I'm not one for a slow build, which is where your characters kind of pick-up the slack, but here's the problem, they're doing too much lifting. You need to show some kind of progression in the story, whether it's characters developing or more plot questions coming up. And you are doing that, but a lot of people nowadays what with action movies and such don't really want to sit through several chapters to get the answers they want.
So as you go through and write the chapters, answer questions and start giving some pay-offs for the things you've set-up. For example, if you introduce one thing in chapter one, answer it in chapter three. Give some space between the questions and answers, but still answer the questions somewhat faster than what you're doing. And this world is so huge and complex that it probably won't be very hard to introduce more questions once you've answered the ones you've set up in chapters one, two, etc.
And same thing with the characters, try to start showing some obvious character growth maybe about five, six chapters in. Show that they are changing and growing, because people read books because they love the characters. They want to see them have a happing ending, even if the plot, the characters' life, is just crap and everything seems to go wrong.
And another thing I would like to add is that there are some super interesting and amazing things that I would love to learn about this world, but you need to work on when to tell those elements. For example, the magic. The magic is amazing. And I love it. But it's way too complicated. I still only vaguely understand it, and I've read several articles and the book. And I don't want you to cut down the magic. I love it as is.
But I am saying that you should think about how you're going to deliver this magic and present it to your readers. When we're first given a real explanation, and when I read it it was quite a few paragraphs of exposition, which isn't great. So, maybe try extending that time we get introduced to the magic. It's such a vital part of the story that if you use it in the plot, the readers aren't going to understand what you're doing, because they don't really understand the magic.
So, think about the plot, and where you could explain the magic. Maybe if Tia's dad is teaching her a lesson, maybe have him use the magic as an object lesson. or maybe if she uses her magic, have her think it through. Explain to the readers what it feels like to use her powers. OR, and here's another way of delivering this exposition is that you leave how the magic works a mystery. You give it some vague perimeters. Starting it off as a soft magic system, and giving the readers a ton of questions on how it works, And if you time it right, you can deliver a bunch of exposition and they'll love it.
That's basically how mysteries work, right. Questions, questions, questions, info dump with answers.
So, don't worry too much about the length of your chapters, make sure there's obvious growth and progression in plot and characters. And find ways to explain the magic and the more complex parts of your world without giving exposition dumps. If you want a video to help you with exposition here's a link.
Exposition part 1
Exposition Part 2