Hi thanks for the quick reply. I had already done Q3, Q5 and DSM instructions and none of those worked.
Then I realized I was using my registered hostname instead of my internal ip address directly. (this is what happened when I clicked the Plex Media server Button within synology).
Once I used my IP address instead, it started the server setup.
SSH is disabled in my NAS and I would prefer not to enable it…does it need to be enabled to access media from outside my LAN?