

You do not even need a port based firewall when the server is open on the internet.
When you configure the software to not have unnecessary open ports over the internet connected interface then a port based firewall is providing zero additional security.
A port based firewall has the benefit that you can lock everything down to the few ports you actually need, and do not have to worry about misconfigured software.
For example, something like docker circumvents ufw anyway. And i know ppl that had open ports even tho they had ufw running.
Either you are heavily misinformed about how difficult arch is, or you lack any confidence in your ‘Linux skill’.
Choose the system you want to achieve, follow the wiki and choose the software you want to use using it and you are good to go, it really is not that hard. You can always use archinstall.