Critique for my mix of characterization and system exposition [Progression Fantasy, 2442 words]

Link to except: https://docs.google.com/document/d/1Bf7kW1re2llWtGonEvgYNko8BBpJNwjsfxVgDEu10Aw/edit?usp=drivesdk

I'm introducing a new aspect of my magic system to the readers, something that it's hard to simply show, because for it to be put to use the main character would have to do something that it doesn't make sense to try without any actual reason to do so. The equivalent of swallowing a random pill he found on the ground. I tried to turn in that exposition on the new aspect of my magic system into moment of characterization in connection between my two main characters. Specifically having one of my characters be aware of what is being explained but also having a personal connection to it in her past. Where is the other is both of trying to learn and trying to understand her feelings on the matter.

Ideally, the result would be an explanation that feels like a fairly natural conversation between two people, and characterization that feels like a reasonable response to the explanation. My biggest worry is that it ends up being over explaining or unnecessarily expositive twice over.

Honestly, the characterization is a bit more important. The explanation being not perfect, can be rectified by demonstration but if the character interaction isn't working then it means that the scene needs an overhaul. Part of the problem is that I started writing the scene from the perspective of just explaining, but it ended up becoming something that they think does more Justice to the story but I wonder if it distracts from itself. I also really worried that I got a bit due on the nose and cheesy at the end, the sentiment I'm trying to express is something that is a bit personal in a way so I wouldn't be surprised if I overdid it.