Need help understanding and setting up Dockers for Brand new install.

I'm sorry this post my be in the wrong place. I cant figure out if this is a install issue or what yet. I'm coming from a FreeNas enviroment I started that at version 9 something. And setup a simple plex media server and just did updates a upgraded a few times. But never had any big issues and I barley had any need to get in and use the CLI or putty maybe a few times but nothing major.

I had a custom computer I made last year I didn't end up using. So I added some extra spare hard drives and loaded OpenMediaVault to planning to move off my Freenas box.

I'm sorry again getting off topic.

I need help setting up Dockers and using these templates.
TechoDad does some really great simple video BTW. But it's not really matching up to a new install of OpenMediaVault. I really wanted to go this route VS Freenas. Cause the Dockers choices look way better than what FreeNas calls Plugin's. Granted I'm sure there is some major differences.

But I really wanted to run Plex and get rid of my little RasberyPi I use for Pi-Hole. And push these into OpenMediaVault.

My Setup is pretty simple and I'm not planning on doing a lot more than what I got right now.

I'm running a AMD Ryzen 5 3400G with GPU 32GB ram

a NVME 256GB a 240gig SSD and 3 - 5TB SATA drives.

I'm not going to buy new hardware if I cant use this or get too much crap about it. I just say screw using this and find a different product and give this software choice the finger.

So how do I set this up and should I install the Dockers to my 240gig SSD and move that to be the source. or just install things as the defaults pop up?

I did see like how I could define the dockers install path. I didn't know if I should do that or not. Or if I should just keep the defaults. Cause I have OpenMediaVault installed on my NVME already. Also once I install Dockers do I need Portainter? or do I just use Yacht? Or should I reload and use a earlier version where I can find more guides that can help me set this up easier? I'm just very lost on how to make this all work.

Ok I think I'm still figuring it out. I figured out how to install a docker today. I followed the video for setting up Dockerstarter I think it was.

That's a little tricky and it didn't really help me set up all the global prams very well. I know I must sound like I dont know much. I'm just use to some of the easier settings that FreeNAS did. I think I like most of the settings in OpenMediaVault better. But right now I'm really struggling with the network settings and like how to Name my Plex Host in DockerStarter. I cant seams to change any of those settings in any kind of GUI after its created in Dockerstarter. Same with network. I cant seam to change that either. I need to figure out how I can maybe create a small DHCP pool or a way I can like change the IP address of the Docker. This is very frustrating.

I tried that but got some sort of error about not able to do edit in a Kubix cluster or something like that. Or something that started with a K.

Anyway I gave up and reloaded again already going to try using someone else's guide or video to get a docker going. If I cant figure it out after this pass I'm giving up. This is my 6th or 7th time reloaded. I like to get stuff right vs uninstalling stuff. Anyway like I said I think this might be my last attempt to get a docker and plex going the way I expected. It kind of sucks that a lot of the videos out here don't match up cause of slightly different versions.

Ok I just figured out what I did wrong I needed to select local when it came to Portainer to manage.

I selected the wrong one and it kept coming up the wrong way.

I just found a new set of directions before I saw your post that showed me that step I missed.