

TBH, it sounds like you have nothing to worry about then! Open ports aren’t really an issue in-and-on itself, they are problematic because the software listening on them might be vulnerable, and the (standard-) ports can provide knowledge about the nature pf the application, making it easier to target specific software with an exploit.
Since a bot has no way of finding out what services you are running, they could only attack caddy - which I’d put down as a negligible danger.
Grew up on it. My dad set up a Ubuntu 4.10 PC for my brother and I when we were 3/5 (no internet, obv), and it stuck.
Used Windows for a brief time in highschool to be able to play online with friends.
Went right back to Linux when going to university. Will never change back, both for ideological reasons and because Linux is just better.
Next step: NixOS on a phone