Several things I noticed. Specifically on the narration and clarity issues.
A questionable usage of parentheses.
I usually frown on the usage of parentheses in a first person POV, but I understand the freedom of stylistic choice, and the urge to experiment, so I won't ask you to not do it. But there are several instances I saw where such usage were terrible, even going as far as lowering your story quality.
A certain paragraph:
Cyrus is a friend whom I’ve known since childhood. (I mean, I’ve known him since he was a baby. Now that you mention it, I also knew his father since he was a baby… and his grandfather as my ex-bo… I mean, good friend.)
You would have fared better if the parentheses were never there. In fact, that would make the narrator (Fiona) have more personality—than the currently no-context and detailless narration which is already raised by other users before me.
The portrayal of Cyrus' muteness and others.
It doesn't seem there's any different of the way you narrate his disability compared to other character. It's just [I said/she said] and [he signed]. And I don't mean to say "oh, he must look special, because he's different," I just think you can make make it more interesting. This includes other characters too by the way. The dialogue tags are filler, sometimes you can just delete them altogether, instantly making the dialogues better, or sometimes you need more description than merely "I swallowed", "her expression darkened", etc.
Confusing dash lines.
These things always appear. But I'm sorry, please be consistent.
---------------------———————————--
---------------------———————————-----------------------———————————--
So like why? Is there any particular reason (which us readers seems not allowed to know) as for why they have different weight? Why one is just three dashes while others longer? Different time spent? Or something?
They are meaningless noise, making the transitions worse than they're supposed to. And not only that, you also use the same dash lines for perspective changes, which makes it even more confusing.
AND THE MOST IMPORTANT THING.
I hate LitRPG, but your story main page claims the genre is in the story, and after reading it until the latest chapter, I don't seem to find any LitRPG?