Anyone have recommendations for simplified interface for a firewall?

I'm tight on space with 23.05, and trying to get used to the complexity but IP Tables is like handing highschool students an ANSI C book to get started coding. I need the 90% effective implemented features version that covers 99% of users with 1% of the default verbosity.

The whitelist I have been using in PCWRT has been effective and is simply "IP-Address:port-number". That is all I really need.