Am so happy for you! New sewing machine days do not come often.
Two years in and I'm still learning the features of my new-to-me modern Bernina. Mostly what I do is piece quilts and I may never learn how to make a buttonhole and I'm ok with that!
But I did want to learn a lot of the new features and so gave myself projects to work on them, whether it was semi-silly like monogramming the hubby's bowling ball towels or trying three different ways to quilt on crib sized projects. I never liked partial seams until I had the thread cutter, makes a world of difference to me and such a little thing.