put in my public IP,private IP and the IP on the back of my modem
No no no. Stop what youre doing and first understand how opening your services to the public internet works, and what the risks are.
Try subs like /r/HomeNetworking maybe, and the Jellyfin forum.
it didnt work
Okay...
What to do?
Start by actually providing details of the problem? Or better yet, just go and ask on the Firefly Github page, this here isnt techsupport.
How long is a piece of string?
Forward Hostname: 10.11.0.1
Forward Port: 7676
Since you mention that both NPM and nginx are in the same Docker network, you need to point NPM to the internal port of nginx. Not the mapped port which is only for the Docker host machine. I would assume your default internal nginx port is 80 and you map that for manual access to 7676. But NPM needs to be pointed at the 80.
In addition you should only use the containernames as hostnames with Docker networking. The 10.11.0.1 is probably your Docker host IP, not the IP of the nginx container itself. And those are dynamic by default.
So change your NPM settings to:
Forward Hostname: nginx
Forward Port: 80
Very basic reverse proxy and Docker network stuff. Btw, /r/Docker and /r/NginxProxyManager both exist.
Also, I tried getting an SSL certificate but was met with an error, and now it looks like I've hit the hourly limit on that...
Cant say anything about the SSL cert error without any details at all. But hitting the hourly Lets Encrypt limit is easily avoidable by simply using the staging CA instead of the live CA, which is the recommended way for doing fresh setups and youre unsure of how it works. Using the LE staging CA you can mess with settings and try stuff out, without getting limited. Once you have everything working, you switch it over to the live CA and then you get a valid cert.
With a AMD CPU and AMD GPU, my guess would be that youre using no hardware-acceleration when transcoding video. Or if you do, it cant keep up with it for 5 streams.
Why not simply search this sub? The answers to this question are always the same.
Just like Satisfactory: Farming Simulator xD With a dedicated server you can choose to keep the sim running while no players are logged in.
It only sucks that they dont offer the server software as a standalone independent free software. Instead you need to buy another copy of the game to run the server with, and im pretty sure if you want to use DLCs, you need to buy those for the server too. Mods of course exist and make some of the paid DLC less interesting. Still not a great practice. Other games only require the host to own DLC and each connecting player can make use of them, while playing on that server. Imo this leads to making a game much more interesting to a small group of friends.