[Need Advice] How do I setup remote ssh for my jellyfin server?

I currently have a jellyfin server on a rpi4 running raspbian (I think). I’m planning to migrate that to a Dell Wyse mini pc before I go on a month long trip. I would like to be able to ssh into it from outside my home and add movies and stuff. I have already setup ddns for the jellyfin server, so I only need for a way to add...