There are two types of magic in my world: talents and mages. A talent can do one thing, one magical trick.
A magic has raw power that can be shaped using mental constructs (e.g., spells).
In the story above, Kilan is actually a mage but doesn't know it. Instead, she knows only a single spell (poorly) and has been convinced she can never do anything else.
The difficulties in using the magic. Talents are typically effortless or natural, they don't fight against the mind or body.