Install docker and docker-compose. Then I suggest installing portainer (also docker) to manage all docker containers. From there you just need your docker-compose.yaml for each stack, basically you copy-paste in WEB GUI, do some adjustments, hit deploy and you are done :D You want 2 stacks:

• Jellyfin (install this first, its simple and easier to start with)
• arr stack (trash guides, and more info on wiki.servarr.com)