Like, I hear all the time that you shouldn’t open any ports on your networks fire wall for security reasons this and security reasons that. But what are the actual security implications/risks of forwarding a port for something like Jellyfin or a Minecraft server or something like that? Explain like im 16 (or something)
That depends on the port/service you’re forwarding.
It also depends on your ISP if they filter some standard ports.
Non-standard ports can obfuscate your service, prevents it from being detected by crawlers and bots.
Start small and don’t ignore security standards.
Patch your stuff. Use common sense.