I might rename them. So, e.g. if I’d add another Pi5, the existing one would become rpi5-1 and the new one rpi5-2.

Wait until I tell you about all the small issues this zoo of devices brings with it… haha.

That one was called just rpi.domain.com, but didn’t stand the test of time…

MacBook Pro: mbp.domain.com
Raspberry Pi 2: rpi2.domain.com
Raspberry Pi 3: rpi3.domain.com
Raspberry Pi 4: rpi4.domain.com
Raspberry Pi 5: rpi5.domain.com
(Yes, I have one of each.)
Synology DS415+: ds415.domain.com
Phone: iphone.domain.com
Watch: watch.domain.com
AppleTV: appletv.domain.com
Nintendo Switch: switch.domain.com

A similar project in Europe (well, mostly Germany) is Freifunk.

Unless you’re using outdated server software, there’s nothing inherently insecure with exposing ports to the Internet. Be it port 80 or 443. Just keep everything up to date and maybe add fail2ban to stop people poking around.

+1 for INWX

I don’t know anything about Neptune, but a Fediverse-version of TikTok is Loops.video.