Linux

Docker is a ~~developer~~* tool, not really something you should be using without some technical knowledge, or at least some experience in the terminal. It's purely a terminal application, so you just type "docker" in the terminal to use it. You can also type "man docker" to view the manual (which shows arguments and command you can use) but again, that won't help much without some prior knowledge.

The things you're trying to use look like self-hosted web servers, which is a lot to set up for someone who's new to the terminal. I won't stop you if you want, but be warned. I'd recommend using something simpler like cozy, which you should be able to find and download in the software store.

*Edit: it's not only a developer tool, it's used for deployment as well. I lumped the two together. It's still a tool made for people with more familiarity using the terminal though.

Docker is a pain in the dick

how the hell do I find docker

Type “docker” in terminal and hit enter. Since it’s installed, your system will likely recognize it as a command and populate a help menu for you. You’ll want to visit docker’s website for a full manual.

I strongly suggest that you install portainer if this is your first time playing with docker.

It'll make your life and learning curve dramatically easier.

I'm not suggesting you dont learn how to do it all over CLI (I actually think CLI is way easier and faster to deploy once you get the hang of it), but if you're looking to deploy something right away, I believe portainer is your best bet.

podman is better but thats just my opinion btw

Try a more managed and out-of-the-box solution first, then work your way down to the commandline. I'd recommend one of the NAS solutions like openmediavault (if they still do docker) or https://cockpit-project.org/

or Docker for Desktop or podman.io

(maybe lxc containers with proxmox or unraid)

Docker can be really confusing, but IMO being able to add and remove software without having changes made throughout your system is well worth the effort.

There are distributions like CasaOS and TrueNAS Scale that try to offer at least a bit of graphical guidance for some popular apps.

Otherwise, you're jumping into the server pool, Windows doesn't really work that different from Linux in that area (in the sense that you can just click on things).

I would check out tutorials or YouTube videos. Try: https://drfrankenstein.co.uk/sabnzbd-in-container-manager-on-a-synology-nas/