This is a super simple way to get an Azure Aarch64 instance up and running, plus add in Ubuntu 20.04, Git, curl, python, and docker using Terraform.
https://amperecomputing.com/guides/ampere-vm-setup-using-terraform/azure
Once you complete it, look into a deeper dive on what everything thing means. Once you master this it move on to more complicated topics using terraform on our gitHub.