There are many tutorials for creating a Raspberry Pi OS[0]. Running in a VM like qemu is the easiest and cheapest way to start (setting up a bootable SDcard is

There are many tutorials for creating a Raspberry Pi OS[0]. Running in a VM like qemu is the easiest and cheapest way to start (setting up a bootable SDcard is more involved). A "something that boots" kernel is very small although obviously it doesn't do much. By the time you get to "hello world" the program will have grown but it's still relatively small. [0]: https://jsandler18.github.io/ https://jsandler18.github.io/