Briefly wrestling with the notion of starting there, but I'm pretty sure that the plot will not take on a nice form there.
(Maybe it's a bildungsroman? Those do have a looser weave in the external plot -- but even so, it may stay backstory.)
But the muse was playing around with the stage where she is being pressured, with some firmness, to master her spellcraft and invoke it with words and gesture rather than just spontaneously summoning it. And she sulks.
She really likes the spell that protects her from weather. Was considering how her mother might show her that she can use to have other people to come out and play with her. Or that her other spells might be fun if she didn't use this spell all the time. There are wizards about who can show her possibilities -- and boy would this take up scenes.
And then I remember she's going to have four children in the course of the story. At least one of whom will be a sorcerer like her. The scenes can be the child's, and with her telling a few anecdotes about her having been even more mulish.
I should work on getting the outline past the wooing to the wedding.