Some initial steps to get the internet networking side of things working.
Due to the way that the cellular network is operated in Australia(every device has private IP) we need what is called a bounce server or sometimes a funnel with a reverse proxy.
This bounce/funnel server acts a public facing side of the network connections allowing public internet access to a node inside a Virtual Private Network. The reverse proxy is easy to set up. I like a webserver called caddy for the reverse proxy as it includes very simple integrations with letsencrypt's free TLS service.
For the VPN I'm currently using wireguard as it is low idle traffic, straight forward to setup and supported well by modern Linux kernels. Also OpenVPN is a good choice but is a little more challenging to setup.
For the exit node I'm using AWS instance in Sydney. (costs about $10.66 per month).There are ways we could do it without the AWS instance, but it is much less flexible, and the flexibility to change out any part is critical to get the thing on the internet. One cheap way is with Tailscale as their offers are very reasonable pricing starting at $0 per month.
currently
https://vk3ynv.sadarc.org is under test (a stand in kiwi sdr, not the listening post sdr).