Do you have an old PC lying around gathering dust? How about a small-capacity USB flash drive sitting, unloved in a drawer? You can reuse your old computer and a USB flash drive by installing a tiny Linux distribution.
Mini Linux distros are great as they require fewer system resources than other options yet still deliver a whole operating system experience, and we have nine of the smallest Linux distros for you to choose from.
I think one of the smallest yet fully up-to-date distros around is Alpine Linux.
It might not be a perfect desktop because of Musl incompatibilities but hey, it has a ton of apps in the repos, if your usecase it’s simple it might be enough.
Keep in mind that it doesn’t have good out of the box support for broadcom. (Broadcom is the old Nvidia and is a pain to get working under Linux)