Well one of the biggest mistakes is that you are downloading from some random server. Never download code from unknown servers.
Now to the web site why not try the forums under place where you plan to host your server and ask about an opml package - there is already one here - but I do not know what language it is written in - if the opml is written in perl i would say - yes it's a good server ready to go.
The main thing as 50e0806aeb freyaly
https://neherbaria.org/portal/checklists/checklis