Building and starting a QEMU image
pmbootstrap init # Choose a qemu-* device (x86_64: amd64, arm: vexpress-soc) pmbootstrap install --no-fde pmbootstrap qemu --image-size=2G
amd64 version is recommended if you don't know which one to choose. See the device specific pages (links below) for the differences.
--image-size=2G parameter will increase the image size to 2GB, so you don't instantly run out of space (by default the image size is as small as possible). Check out
pmbootstrap qemu --help for more options, such as performance tweaks.