If you can boot an os from usb (basically the same for all distros) you can try proxmox.

There are these incredibly useful helper scripts that setup entire services in 1-2 copy pasted commands.

community-scripts.github.io/ProxmoxVE/

To explain what proxmox is its basicly virtualisation software, it can run vms but also lxc (light linux containers) and share resources very efficiently between all of them.

Its also very easy to setup raid and there own storage format is very efficient.

Jellyfin, radarr, sonar. They are all included ok the helper scripts, one command installs that will give each a dedicated lxc.

Its well documented to the point that any decent llm can help you learn whatever you need.

Personally i am very hands off with mine, the hardest part is choosing what ip i want and i rarely update or mess with it if not necessary.

For hardware i recommend plenty of ram (can Be bought and installed seperatly), more cores is usually better and internal graphics can save you some hassle depending on what you are doing (also allows you to dedicate a Big gpu to some services).

A good practical case is always a blessing when you need to check the insides.