Filling some gaps:
systemctl enable --now firewalld unattended-upgrades
Read through /etc/firewall/firewalld.conf, especially the part about how containers might bypass your firewall if you don't change defaults.
Also rootless podman should run well out of the box as a mostly drop-in replacement for docker (meanwhile docker also does rootless now) and allows you to run the container runtime unprivileged. This is more secure than adding user to docker (effectively root) group. Setting up autostart by writing systemd .service unit files works the same for both Docker and Podman.
This community is funny.
From what I can tell this is is basically the spiritual evolition of Bazzite, by the same team and built with a similar approach. Yet look at how differently they are received.
Brand identity memes are truly impactful these days. Names and presentation seem to drive majority sentiment.