You can move around to load new chunks. I haven't done a ton of work on this but I might come back to it at some point, or release a game that uses the same script. Keep in mind, it doesn't really load a ton of chunks, since this is just an experiment, but it will load some, so if it isn't loading anything and you're out in the middle of a void, as long as you haven't gone super far out, it's likely that it's running too slow. Either that, or your computer has an average framerate. But if you're on a school computer, there'll likely be some loading lag. Moving diagonally may cause chunks not to load.
I used the idea often associated with Minecraft. It's actually quite commonly used, but Minecraft was the first to truly do it. If this runs slow, go to https://turbowarp.org/557664385