They're cannonly negative CR, so it makes sense that they wouldn't want to work together. There are other ways that Charm could learn about magitech. Since they're both in-cannon magic wielders of the same variety there's bound to be a bit of a clash, but there's also always more then one way to go about things.

Plus Charm is smart and resourceful and manipulative. She's sure to find a way to learn what she needs to.