Leave Servarr as last thing to setup because it requires many services to work together and even small mistake in config will make it not work. Its not hard, but it will be easier after you learn how to setup jellyfin or audiobookshelf.
I have no experience with your hardware, but after you install docker and docker-compose get Portainer and get familiar with docker compose. Portainer is simple gui that lets you manage all containers.
So for example, you get docker-compose example for jellyfin, eddit PUID, GUID, path to your library folder, copy that in Portainer Stacks, hit deploy and BAM! Your jellyfin is available on localhost:8096
You might face many issues in the begining, but dont give up, its getting more and more easy over time. I still think Im a noob, but have no problems with my 40ish containers running on poor home server 😉. Dont forget this community is awesome and helpfull