There's obviously this, so I don't want to be too negative, but
that was my major project for the last quarter of the year, roughly (maybe third). It was something I thought would be achievable without very enormous effort (effort yes, but that class was fairly easier than most I've done), and t was. So I'm sort of glad I could set an achiavable goal and meet it.
So that is a pretty massive achievement for me given the past few years, and I don't want to downplay it, but it is like the one single thing I achieved this year, I think. And as noted at least 2/3 of the year did not go to that.
I've had some projects this year I tried doing but failed, like nanowrimo.
There are I guess some lesser things, like I managed to read some books during the summer, but if I achieved anything more on that sort of scale than I've forgotten.
Also I feel I've gotten better at identifying various challenges I have, but gotten worse at dealing with them