I use TC as my daily driver. Love it.
I started with a very old computer which helped me through high school and even university, until it finally gave up and died (sad times). Over time I learned how to better utilize hardware with the right tools, like compiling LaTex using a very low end android device, chroot and a bluetooth keyboard while on-the-go at the university.
The point I'm trying to make is that now, I would like to do my computing in the most universal and portable way: going bare-bones. Bookkeeping is now part of my new endeavor.
Asking LLMs and checking wikis, apparently sqlite is the way to go. I tried to just go away with busybox awk and CSV files, but learning sqlite doesn't sounds bad. I don't want to waste time and efforts. If you have a better suggestion please share it.
Also, can you tell me how you keep your finances in order? LibreOffice, gnucash, Google Docs... pen and paper?