Services
GitHub
GitHub integration is offered during installation, so you'll have access to the gh command to checkout private repositories for doing real work. And git itself is configured with name/email identification during signup, so you can make commits right away.
Tailscale
Tailscale is an excellent way to access your Omaterm box over the internet without exposing it directly to the internet. Their free offering for personal use is very generous. You'll be offered to connect your box to your Tailnet during initial setup.
SSH
Omaterm starts an SSH server on your box by default, but it'll just use the regular password authentication until you run omaterm-ssh-key, which will accept your public key as a paste, then the box is locked down to only accept SSH keys (and not regular passwords).