Welcome!
Glad to hear you got up and running on a DIY build, I have added your hardware to our “Known Good” List.
You can Setup SSH Access, but be warned, that most things you do in here are dangerous (this is not a standard Linux install - it is designed to be easy to use, via the UI only).
We are working on adding several connectivity solutions, including VPN-esque functionality, which will be available later this year, but we do not support any general solutions at this time.
Happy Hosting!