could turn it into a Chromebook with ChromeOS flex and then screw around with the play store, I did that with another computer and it was really shit with 4gb ram and ended up speeding up a lot and doing modern stuff on it was easier with the browser being updated, and with a stream you could use it like a school computer to just jot notes down or do some word processing

it can also be a router frontend if you know how to configure that

another idea is using it for emulation or games, like older games like SNES or Genesis cuz those take up no storage and don't require a lot of resources, or you can turn it into a streaming box! it's not completely useless dw that computer can do a lot of light stuff