Changing the port seems like a pointless step, just disallow access from everywhere and allow only from select IPs. Port scanners will scan all open ports and will detect that it's ssh, regardless of port number.
Agreed. Security through obscurity is a fallacy.
If OP just wants to use it himself, a good idea might be to setup a VPN service and only allow the other services to be used from the VPN. That can be done with wire guard and a reverse proxy for example.
While I do completely agree, changing ports is more about getting rid of low-hanging fruit so some script kiddie doesn't get into 22. But again I do agree with everything you said.
Just firewall the port and there's no difference for your hypothetical script kiddies. Don't ever do security by obscurity.
Of you have Skript kiddies logging in successfully on 22, you have way different problems.
Of course, changing a port number is not a good security improvement even in the realm of security through obscurity.
Maybe try out FreedomBox? freedombox is a Debian package which automatically sets up apache2, firewalld, fail2ban and Letʼs Encrypt. It also automatically adds pre-canned configuration files for applications you install with it (e.g. Mediawiki, WordPress, Matrix, Postfix/Dovecot). The theoretical goal of FreedomBox is to allow anyone to set up a webserver and administer it via a webUI. So, although I would say itʼs not quite there yet for command-line-illiterate users, I have found the software useful as a turnkey server to see what makes certain web applications tick, albeït in mostly vanilla form.
For example, after installing a new app like WordPress, you could examine what exactly the FreedomBox scripts changed in the /etc/apache2/ or /etc/fail2ban/ configuration files.
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