I managed to clean up a lot of space thanks to all of your suggestions.
I ran @NaN’s commands and that cleaned up about 8.5 GB of space.
Then, I checked out @lum1nuss’s suggestions. Stacer helped me clean up about 10 GB of application cache (I unchecked things that seemed alright to leave alone, like Krunner and browser cache).
Finally, Baobab helped me notice that my Unreal Engine 5 installation was somehow taking up… 176 GB of disk space. I recall the engine being a lot smaller than that… Not sure how the folder got so big. I don’t use UE5 anymore, so I just deleted it.
Snapper snapshots were ok. Snapper was configured to only save the last 10 snapshots, so I didn’t gain much from deleting the older 9 logs.
Thanks very much, everyone!