...I am. But it's not something I've explored back home.

[And even here, were she not convinced she could use it to defend herself and her family here when needed, she likely wouldn't have considered learning about it. She's not fond of the Force and doesn't like relying on it or using it at all, since her direct experience with it outside of Luke is from Vader.]

I'd be careful if that's how you're planning on thinking about this. I can't believe he doesn't have an ulterior motive with this apology, and I wouldn't let your guard down merely because he returned your lightsaber.