To install Almalinux on a Raspberry Pi, we need to get the image first. There is a lot of information on the wiki of Almalinux. In my case, I downloaded the image and flashed a micro SD card with Balena Etcher.
When the operation completes, don’t put the SD card in the Raspberry Pi yet. By default, SSH is configured not to allow password logins. This is a good thing!