Small ansible playbook adjustments/improvemnts

We have an ansible playbook that we want to improve. Basically what we do is: New hosts: - we get a host with only root access - we create a new user, set ssh acces, add it to sudoers and close root access via SSH - later we continue by setting up docker and other things Old hosts: - we upgrade packages - apply small changes We want to keep a list of all hosts, for the new ones setup and close root.. for the other ones run the normal roles. We later need to improve a few other small details.. This should be a small quick project, but we are looking for someone to help with these things in the long term. Please provide a link to previous projects (or source code) done with Ansible